science
Grade-7
Easy
Question
A light ray traveling through air enters the ice (n = 1.3) floating on top of the water (1.33) in a pond. It bends ___ the normal at the air-ice interface and ___ the normal at the ice-water interface.
- Towards, away from
- Away from, towards
- Towards, towards
- Away from, away from
Hint:
- When a ray of light passes from a rarer to denser medium it bends towards the normal.
The correct answer is: Towards, towards
- When a ray of light passes from a rarer to denser medium it bends towards the normal.
- At air-ice interface , air is rarer and ice is denser because refractive index of air is less than ice so it will bend towards the normal.
- At ice-water interface, ice is rarer and water is denser because refractive index of ice is less than that of water so it will bends towards the normal.
- So, towards, towards is the answer.
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