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8 Physics Vocab 4
Refraction of light
| Term | Definition |
|---|---|
| Refraction | Bending of light waves due to change in speed of light, when they travel from one medium to another |
| Refracted Ray | The ray of light that bends after entering a different medium |
| Angle of refraction | Angle between the refracted ray and the normal |
| Optically dense medium | Speed of light is less in this medium and has greater refractive index |
| Lens | a curved piece of transparent material, such as glass or plastic, that refracts light |
| Concave Lens | This type of lens is thinner in the middle and thicker at edges |
| Convex Lens | This type of lens is thicker in the middle and thinner at the edges |
| Concave lens image | upright and smaller than the object |
| Concave lens effect on light | This lens diverges light This lens refracts light rays that pass through it, away from the normal |
| Convex lens image | image depends on how far the object is from focal length, can be big and small |
| Convex lens effect on light | This lens converges light |
| Concave lens use | flashlights, door viewers, correct nearsightedness |
| Convex lens use | magnifying glass |
| Use of Combination of concave and convex lens | telescopes, microscopes, camera |
| Refractive Index | the ratio of the velocity of light in a vacuum to its velocity in a specified medium. |
| Optically rarer medium | speed of light is more in this medium and has lower refractive index |