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Q: When a ray of light travels from a denser medium to a rarer medium, it bends :
  • A. towards the normal and slow down
  • B. away from the normal and slow down
  • C. towards the normal and its speed increases
  • D. away from the normal and its speed increases
Correct Answer: Option D - When light enters from denser to rarer medium, the light bends away from the normal and its speed increases. When light enters from rarer to denser medium, the light comes towards the normal and its speed decreases.
D. When light enters from denser to rarer medium, the light bends away from the normal and its speed increases. When light enters from rarer to denser medium, the light comes towards the normal and its speed decreases.

Explanations:

When light enters from denser to rarer medium, the light bends away from the normal and its speed increases. When light enters from rarer to denser medium, the light comes towards the normal and its speed decreases.