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A light ray strikes a plane mirror at an angle of 45 degrees. What is the angle

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Question: A light ray strikes a plane mirror at an angle of 45 degrees. What is the angle of reflection?

Options:

  1. 0 degrees
  2. 45 degrees
  3. 90 degrees
  4. 30 degrees

Correct Answer: 45 degrees

Solution: 

According to the law of reflection, the angle of reflection equals the angle of incidence, so it is 45 degrees.

A light ray strikes a plane mirror at an angle of 45 degrees. What is the angle

Practice Questions

Q1
A light ray strikes a plane mirror at an angle of 45 degrees. What is the angle of reflection?
  1. 0 degrees
  2. 45 degrees
  3. 90 degrees
  4. 30 degrees

Questions & Step-by-Step Solutions

A light ray strikes a plane mirror at an angle of 45 degrees. What is the angle of reflection?
  • Step 1: Identify the angle at which the light ray strikes the mirror. In this case, it is 45 degrees.
  • Step 2: Understand the law of reflection, which states that the angle of reflection is equal to the angle of incidence.
  • Step 3: Since the angle of incidence is 45 degrees, the angle of reflection will also be 45 degrees.
  • Law of Reflection – The angle of incidence is equal to the angle of reflection when a light ray strikes a reflective surface.
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