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A beam of light passes through a prism with an angle of 60 degrees. If the refra

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Question: A beam of light passes through a prism with an angle of 60 degrees. If the refractive index of the prism is 1.5, what is the angle of deviation? (2023)

Options:

  1. 30 degrees
  2. 60 degrees
  3. 45 degrees
  4. 15 degrees

Correct Answer: 30 degrees

Exam Year: 2023

Solution: 

Using the formula for angle of deviation: D = A(n-1), we find D = 60(1.5-1) = 30 degrees.

A beam of light passes through a prism with an angle of 60 degrees. If the refra

Practice Questions

Q1
A beam of light passes through a prism with an angle of 60 degrees. If the refractive index of the prism is 1.5, what is the angle of deviation? (2023)
  1. 30 degrees
  2. 60 degrees
  3. 45 degrees
  4. 15 degrees

Questions & Step-by-Step Solutions

A beam of light passes through a prism with an angle of 60 degrees. If the refractive index of the prism is 1.5, what is the angle of deviation? (2023)
  • Step 1: Identify the angle of the prism (A), which is given as 60 degrees.
  • Step 2: Identify the refractive index (n) of the prism, which is given as 1.5.
  • Step 3: Use the formula for angle of deviation (D), which is D = A(n - 1).
  • Step 4: Substitute the values into the formula: D = 60(1.5 - 1).
  • Step 5: Calculate (1.5 - 1) to get 0.5.
  • Step 6: Multiply 60 by 0.5 to find D: D = 60 * 0.5 = 30 degrees.
  • Refraction and Deviation – Understanding how light bends when passing through different media and how to calculate the angle of deviation using the refractive index and prism angle.
  • Prism Geometry – Knowledge of the geometric properties of prisms, including the relationship between the angle of the prism, the refractive index, and the resulting angle of deviation.
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