📚 Topic Summary
Light travels in straight lines. However, when light moves from one medium (like air) to another (like water), it changes speed and bends. This bending is called refraction. The amount of bending depends on the angle at which the light hits the surface and the properties of the two mediums. That's why things look a bit distorted underwater!
🧪 Part A: Vocabulary
Match the terms with their definitions:
| Terms |
Definitions |
| 1. Refraction |
A. The distance between two successive crests of a wave. |
| 2. Medium |
B. The bending of light as it passes from one substance to another. |
| 3. Wavelength |
C. A substance through which a wave can travel. |
| 4. Angle of Incidence |
D. The angle at which a light ray strikes a surface. |
| 5. Angle of Refraction |
E. The angle between the refracted ray and the normal. |
✍️ Part B: Fill in the Blanks
Complete the paragraph using the words: refraction, speed, water, air, bends.
When light travels from ______ into ______, it changes its ______. This causes the light to ______, a phenomenon called ______. This is why objects appear distorted when viewed through ______.
🤔 Part C: Critical Thinking
Imagine you are trying to catch a fish underwater with a spear. Knowing what you now know about refraction, where should you aim the spear and why?