science
Grade-7
Easy
Question
A light ray traveling in water (n = 1.33) enters glass (1.5). It bends ___ the normal.
- Towards
- Away from
- Along
- Opposite
Hint:
Speed of light in any medium is always less than that of speed of light in vacuum. Hence, from the definition of refractive index we can easily come to a conclusion whether the ray of light will bend towards or move away from the normal.
The correct answer is: Towards
- When a ray of light enters from a rarer to denser medium it bends. But if the ray light moves from denser to rarer medium, it moves away from the normal.
- Here water is rarer and glass is denser as refractive index of water is less than that of glass.
- So it will bend towards the normal.
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