<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: transparent;
      padding: 10px;
    }

    .grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      width: 100%;
      max-width: 660px;
      margin: 0 auto;
    }

    @media (max-width: 480px) {
      .grid {
        grid-template-columns: 1fr;
        gap: 10px;
      }
    }

    .panel {
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 12px;
      padding: 10px 8px 8px 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
    }

    .panel.danger {
      border-color: #fecdd3;
      background: linear-gradient(180deg, #fff5f5 0%, #ffffff 100%);
    }

    .panel.safe {
      border-color: #bbf7d0;
      background: linear-gradient(180deg, #f0fdf4 0%, #ffffff 100%);
    }

    .header-tag {
      font-size: 13px;
      font-weight: 700;
      letter-spacing: -0.2px;
      padding: 4px 10px;
      border-radius: 20px;
      margin-bottom: 6px;
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    .danger .header-tag {
      background: #ffe4e6;
      color: #e11d48;
    }

    .safe .header-tag {
      background: #dcfce7;
      color: #15803d;
    }

    .diagram-svg {
      width: 100%;
      height: auto;
      max-height: 180px;
      display: block;
    }

    /* Ray animations */
    .ray-uv {
      stroke: #a855f7;
      stroke-dasharray: 6 4;
      animation: dash 1.4s linear infinite;
    }

    .ray-sun {
      stroke: #eab308;
      stroke-dasharray: 6 4;
      animation: dash 1.4s linear infinite;
    }

    .ray-safe {
      stroke: #38bdf8;
      stroke-dasharray: 5 4;
      opacity: 0.7;
      animation: dash 2s linear infinite;
    }

    @keyframes dash {
      to { stroke-dashoffset: -20; }
    }

    @keyframes pulse-hotspot {
      0%, 100% { transform: scale(1); opacity: 0.9; }
      50% { transform: scale(1.3); opacity: 1; }
    }

    .hotspot {
      transform-origin: 194px 90px;
      animation: pulse-hotspot 1.5s ease-in-out infinite;
    }

    .legend {
      display: flex;
      justify-content: center;
      gap: 16px;
      font-size: 11.5px;
      font-weight: 600;
      color: #475569;
      margin-top: 8px;
    }

    .legend-item {
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    .legend-line {
      width: 16px;
      height: 3px;
      border-radius: 2px;
    }
  </style>
</head>
<body>

  <div class="grid">
    
    <div class="panel danger">
      <div class="header-tag">✕ Looking at the Sun</div>
      <svg class="diagram-svg" viewBox="0 0 240 180">
        
        <circle cx="16" cy="90" r="14" fill="#facc15" stroke="#eab308" stroke-width="2"/>
        <path d="M 16,68 L 16,64 M 16,112 L 16,116 M -6,90 L -10,90 M 38,90 L 42,90 M 0,74 L -3,71 M 32,106 L 35,109 M 0,106 L -3,109 M 32,74 L 35,71" stroke="#eab308" stroke-width="2" stroke-linecap="round"/>

        
        <path d="M 108,44 A 56,56 0 1,1 108,136" fill="#f8fafc" stroke="#94a3b8" stroke-width="2.5"/>

        
        <path d="M 108,44 C 84,60 84,120 108,136" fill="#e0f2fe" stroke="#38bdf8" stroke-width="2" opacity="0.85"/>

        
        <path d="M 106,46 L 109,68" stroke="#1e2945" stroke-width="5" stroke-linecap="round"/>
        <path d="M 106,134 L 109,112" stroke="#1e2945" stroke-width="5" stroke-linecap="round"/>

        
        <ellipse cx="118" cy="90" rx="6.5" ry="22" fill="#bae6fd" stroke="#0284c7" stroke-width="1.8"/>

        
        <path d="M 160,46 A 56,56 0 0,1 160,134" fill="none" stroke="#cbd5e1" stroke-width="4"/>

        
        
        <path d="M 32,78 L 94,80 L 118,83 L 194,90" fill="none" stroke-width="2.5" class="ray-uv"/>
        
        <path d="M 32,90 L 94,90 L 118,90 L 194,90" fill="none" stroke-width="2.5" class="ray-sun"/>
        
        <path d="M 32,102 L 94,100 L 118,97 L 194,90" fill="none" stroke-width="2.5" class="ray-uv"/>

        
        <g class="hotspot">
          <circle cx="194" cy="90" r="10" fill="#f43f5e" opacity="0.4"/>
          <circle cx="194" cy="90" r="5" fill="#e11d48"/>
          <circle cx="194" cy="90" r="2.5" fill="#ffe4e6"/>
        </g>

        
        <text x="118" y="32" font-size="11" font-weight="600" fill="#1e2945" text-anchor="middle">Lens</text>
        <path d="M 118,35 L 118,62" stroke="#64748b" stroke-width="1" stroke-dasharray="2 2"/>

        <rect x="122" y="146" width="112" height="24" rx="6" fill="#fee2e2" stroke="#fca5a5" stroke-width="1"/>
        <text x="178" y="162" font-size="11" font-weight="700" fill="#be123c" text-anchor="middle">Retina damage!</text>
        <path d="M 178,146 L 192,97" stroke="#e11d48" stroke-width="1.2" stroke-dasharray="2 2"/>
      </svg>
    </div>

    
    <div class="panel safe">
      <div class="header-tag">✓ UV Sunglasses</div>
      <svg class="diagram-svg" viewBox="0 0 240 180">
        
        <circle cx="16" cy="90" r="14" fill="#facc15" stroke="#eab308" stroke-width="2"/>
        <path d="M 16,68 L 16,64 M 16,112 L 16,116 M -6,90 L -10,90 M 38,90 L 42,90 M 0,74 L -3,71 M 32,106 L 35,109 M 0,106 L -3,109 M 32,74 L 35,71" stroke="#eab308" stroke-width="2" stroke-linecap="round"/>

        
        <path d="M 108,44 A 56,56 0 1,1 108,136" fill="#f8fafc" stroke="#94a3b8" stroke-width="2.5"/>

        
        <path d="M 108,44 C 84,60 84,120 108,136" fill="#e0f2fe" stroke="#38bdf8" stroke-width="2" opacity="0.85"/>

        
        <path d="M 106,46 L 109,68" stroke="#1e2945" stroke-width="5" stroke-linecap="round"/>
        <path d="M 106,134 L 109,112" stroke="#1e2945" stroke-width="5" stroke-linecap="round"/>

        
        <ellipse cx="118" cy="90" rx="6.5" ry="22" fill="#bae6fd" stroke="#0284c7" stroke-width="1.8"/>

        
        <path d="M 160,46 A 56,56 0 0,1 160,134" fill="none" stroke="#22c55e" stroke-width="4"/>

        
        <path d="M 68,36 C 58,68 58,112 68,144" fill="none" stroke="#0f172a" stroke-width="6.5" stroke-linecap="round"/>
        <path d="M 68,36 C 58,68 58,112 68,144" fill="none" stroke="#38bdf8" stroke-width="2" stroke-linecap="round" opacity="0.8"/>

        
        <path d="M 32,74 L 62,76 L 38,42" fill="none" stroke-width="2.5" class="ray-uv"/>
        <path d="M 32,106 L 62,104 L 38,138" fill="none" stroke-width="2.5" class="ray-uv"/>

        
        <path d="M 32,90 L 64,90" fill="none" stroke-width="2.5" class="ray-sun"/>
        <path d="M 64,90 L 118,90 L 194,90" fill="none" stroke-width="2" class="ray-safe"/>

        
        <circle cx="194" cy="90" r="5" fill="#22c55e"/>
        <circle cx="194" cy="90" r="9" fill="#22c55e" opacity="0.25"/>

        
        <rect x="5" y="10" width="76" height="20" rx="4" fill="#f3e8ff" stroke="#d8b4fe" stroke-width="1"/>
        <text x="43" y="24" font-size="10.5" font-weight="700" fill="#7e22ce" text-anchor="middle">UV blocked ↗</text>

        <rect x="134" y="146" width="98" height="24" rx="6" fill="#dcfce7" stroke="#86efac" stroke-width="1"/>
        <text x="183" y="162" font-size="11" font-weight="700" fill="#15803d" text-anchor="middle">Retina safe ✓</text>
        <path d="M 183,146 L 192,97" stroke="#16a34a" stroke-width="1.2" stroke-dasharray="2 2"/>
      </svg>
    </div>
  </div>

  
  <div class="legend">
    <div class="legend-item">
      <div class="legend-line" style="background:#a855f7;"></div>
      <span>UV Rays</span>
    </div>
    <div class="legend-item">
      <div class="legend-line" style="background:#eab308;"></div>
      <span>Sunlight</span>
    </div>
    <div class="legend-item">
      <div class="legend-line" style="background:#38bdf8;"></div>
      <span>Filtered Safe Light</span>
    </div>
  </div>

</body>
</html>

Sun Safety: Protecting Eyes and Skin from UV Light

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #f8f9fa;
      color: #1e2945;
      width: 100%;
      min-height: 100%;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 10px 12px 14px;
      overflow-x: hidden;
      user-select: none;
    }

    .controls {
      display: flex;
      gap: 6px;
      margin-bottom: 8px;
      background: #e2e8f0;
      padding: 4px;
      border-radius: 20px;
    }

    .btn-toggle {
      border: none;
      background: transparent;
      padding: 6px 14px;
      border-radius: 16px;
      font-size: 13px;
      font-weight: 600;
      color: #475569;
      cursor: pointer;
      transition: all 0.25s ease;
    }

    .btn-toggle.active {
      background: #ffffff;
      color: #1e2945;
      box-shadow: 0 2px 6px rgba(0,0,0,0.08);
    }

    .diagram-area {
      width: 100%;
      max-width: 580px;
      position: relative;
    }

    svg {
      width: 100%;
      height: auto;
      display: block;
    }

    /* Beam Transitions */
    .beam-group {
      transition: opacity 0.35s ease;
    }
    .beam-group.dimmed {
      opacity: 0.12;
    }

    /* UV pulsing & flow animation */
    .uv-wave {
      stroke-dasharray: 8 4;
      animation: uvFlow 1.2s linear infinite;
    }

    @keyframes uvFlow {
      from { stroke-dashoffset: 24; }
      to { stroke-dashoffset: 0; }
    }

    .sun-pulse {
      animation: sunGlow 3s ease-in-out infinite alternate;
      transform-origin: 65px 75px;
    }

    @keyframes sunGlow {
      0% { opacity: 0.35; r: 42; }
      100% { opacity: 0.65; r: 48; }
    }

    .badge-label {
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.2px;
    }

    .badge-sub {
      font-size: 9.5px;
      font-weight: 500;
      opacity: 0.85;
    }
  </style>
</head>
<body>

  <div class="controls">
    <button class="btn-toggle active" data-mode="all" onclick="setMode('all')">All Rays</button>
    <button class="btn-toggle" data-mode="visible" onclick="setMode('visible')">Visible Light</button>
    <button class="btn-toggle" data-mode="uv" onclick="setMode('uv')">UV Rays</button>
  </div>

  <div class="diagram-area">
    <svg viewBox="0 0 540 340" aria-label="Sun radiating visible light and UV rays towards Earth">
      <defs>
        
        <linearGradient id="rainbowGrad" x1="0%" y1="0%" x2="0%" y2="100%">
          <stop offset="0%" stop-color="#ef4444" />
          <stop offset="20%" stop-color="#f97316" />
          <stop offset="40%" stop-color="#eab308" />
          <stop offset="60%" stop-color="#22c55e" />
          <stop offset="80%" stop-color="#06b6d4" />
          <stop offset="100%" stop-color="#8b5cf6" />
        </linearGradient>

        
        <filter id="purpleGlow" x="-20%" y="-20%" width="140%" height="140%">
          <feGaussianBlur stdDeviation="2.5" result="blur" />
          <feComposite in="SourceGraphic" in2="blur" operator="over" />
        </filter>
      </defs>

      
      <path d="M 330 340 Q 440 280 540 295 L 540 340 Z" fill="#bbf7d0" />
      <path d="M 320 340 Q 440 276 540 292" fill="none" stroke="#86efac" stroke-width="3" />

      
      <g id="beamVisible" class="beam-group">
        
        <polygon points="78,88 92,62 470,230 445,268" fill="url(#rainbowGrad)" opacity="0.4" />
        <line x1="85" y1="75" x2="458" y2="249" stroke="#f59e0b" stroke-width="1.5" stroke-dasharray="4 4" opacity="0.6" />

        
        <g transform="translate(195, 190)">
          <rect x="0" y="0" width="138" height="34" rx="6" fill="#ffffff" stroke="#e2e8f0" stroke-width="1.5" filter="drop-shadow(0 2px 4px rgba(0,0,0,0.06))" />
          <circle cx="14" cy="17" r="5" fill="#f59e0b" />
          <text x="26" y="15" fill="#1e2945" class="badge-label">Visible Light</text>
          <text x="26" y="27" fill="#64748b" class="badge-sub">(We can see)</text>
        </g>
      </g>

      
      <g id="beamUV" class="beam-group">
        
        <path d="M 75 60
                 Q 105 38, 135 60 T 195 60 T 255 60 T 315 65 T 375 95 T 435 155 T 475 220"
              fill="none" stroke="#c084fc" stroke-width="7" opacity="0.3" filter="url(#purpleGlow)" />

        <path class="uv-wave" d="M 75 60
                 Q 105 38, 135 60 T 195 60 T 255 60 T 315 65 T 375 95 T 435 155 T 475 220"
              fill="none" stroke="#9333ea" stroke-width="3" />

        
        <path class="uv-wave" d="M 85 70
                 Q 115 50, 145 70 T 205 70 T 265 72 T 325 80 T 385 110 T 445 170 T 485 230"
              fill="none" stroke="#d946ef" stroke-width="2" opacity="0.85" />

        
        <g transform="translate(195, 20)">
          <rect x="0" y="0" width="138" height="34" rx="6" fill="#ffffff" stroke="#e9d5ff" stroke-width="1.5" filter="drop-shadow(0 2px 4px rgba(0,0,0,0.06))" />
          <circle cx="14" cy="17" r="5" fill="#9333ea" />
          <text x="26" y="15" fill="#581c87" class="badge-label">Ultraviolet (UV)</text>
          <text x="26" y="27" fill="#7e22ce" class="badge-sub">(Invisible energy)</text>
        </g>
      </g>

      
      <g transform="translate(10, 15)">
        
        <circle cx="55" cy="60" r="44" fill="#fde047" class="sun-pulse" />
        
        <circle cx="55" cy="60" r="32" fill="#eab308" />
        <circle cx="55" cy="60" r="28" fill="#facc15" />
        
        <text x="55" y="68" font-size="28" text-anchor="middle">☀️</text>
        <text x="55" y="106" font-size="12" font-weight="700" fill="#854d0e" text-anchor="middle">Sun</text>
      </g>

      
      <g transform="translate(450, 215)">
        
        <text x="22" y="68" font-size="52" text-anchor="middle">🧒</text>
        
        <ellipse cx="22" cy="74" rx="18" ry="4" fill="#15803d" opacity="0.25" />
        <text x="22" y="94" font-size="11" font-weight="600" fill="#166534" text-anchor="middle">Earth</text>
      </g>
    </svg>
  </div>

  <script>
    function setMode(mode) {
      document.querySelectorAll('.btn-toggle').forEach(btn => {
        btn.classList.toggle('active', btn.dataset.mode === mode);
      });

      const visGroup = document.getElementById('beamVisible');
      const uvGroup = document.getElementById('beamUV');

      if (mode === 'all') {
        visGroup.classList.remove('dimmed');
        uvGroup.classList.remove('dimmed');
      } else if (mode === 'visible') {
        visGroup.classList.remove('dimmed');
        uvGroup.classList.add('dimmed');
      } else if (mode === 'uv') {
        visGroup.classList.add('dimmed');
        uvGroup.classList.remove('dimmed');
      }
    }
  </script>
</body>
</html>

science.ks2.y1.t4.s3

Aligned learning resources

Related diagrams