science
Grade-7
Easy
Question
A light ray bends towards the normal on entering a medium from the air. Which of the following can the second medium be?
- Water
- Coconut oil
- Glass
- All of the above
Hint:
- When rays travel from rarer to denser medium it bends towards the normal.
The correct answer is: All of the above
- When ray of light bend towards the normal then first medium should be rarer than second medium or second medium should be denser than the first medium.
- Here first medium is air so second medium should be denser than air.
- We know air has minimum refractive index that is 1 and all others like glass, coconut oil ,water have more than 1.
- So it will bend towards normal in each case.
- Hence All of the above.
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