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A light ray strikes a plane mirror at an angle of incidence of 30 degrees. What

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Question: A light ray strikes a plane mirror at an angle of incidence of 30 degrees. What is the angle of reflection? (2021)

Options:

  1. 30 degrees
  2. 60 degrees
  3. 90 degrees
  4. 45 degrees

Correct Answer: 30 degrees

Exam Year: 2021

Solution: 

According to the law of reflection, the angle of reflection is equal to the angle of incidence. Therefore, the angle of reflection is also 30 degrees.

A light ray strikes a plane mirror at an angle of incidence of 30 degrees. What

Practice Questions

Q1
A light ray strikes a plane mirror at an angle of incidence of 30 degrees. What is the angle of reflection? (2021)
  1. 30 degrees
  2. 60 degrees
  3. 90 degrees
  4. 45 degrees

Questions & Step-by-Step Solutions

A light ray strikes a plane mirror at an angle of incidence of 30 degrees. What is the angle of reflection? (2021)
  • Step 1: Understand the problem. A light ray hits a mirror at a certain angle, called the angle of incidence.
  • Step 2: Identify the angle of incidence given in the question, which is 30 degrees.
  • Step 3: Recall the law of reflection, which states that the angle of reflection is equal to the angle of incidence.
  • Step 4: Apply the law of reflection to find the angle of reflection. Since the angle of incidence is 30 degrees, the angle of reflection is also 30 degrees.
  • Law of Reflection – The principle stating that the angle of reflection is equal to the angle of incidence when a light ray strikes a reflective surface.
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