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Indian Navy SSR Light - Reflection and Refraction — practice questions

Explore 3 free Light - Reflection and Refraction questions in Indian Navy SSR Science. Open each question or exercise to read its content, reference answers and available explanation.

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Light - Reflection and Refraction questions and exercises with answers

Showing questions 1–3 of 3.

The distance between the pole and the principal focus of a spherical mirror is called the:Read the answer and worked solution →Light bends when it passes from one transparent medium to another. This phenomenon is called:Read the answer and worked solution →A concave mirror has a radius of curvature of 20 cm. Its focal length is:Read the answer and worked solution →

Worked practice questions

The distance between the pole and the principal focus of a spherical mirror is called the:

  1. radius of curvature
  2. aperture
  3. object distance
  4. focal length
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Correct answer: D. focal length

Focal length is the pole-to-principal-focus distance.

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Light bends when it passes from one transparent medium to another. This phenomenon is called:

  1. Reflection
  2. Refraction
  3. Dispersion
  4. Diffraction
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Correct answer: B. Refraction

The bending of light when it passes from one transparent medium to another is refraction. Reflection is bouncing back dispersion is splitting by colour diffraction is bending around obstacles.

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A concave mirror has a radius of curvature of 20 cm. Its focal length is:

  1. 10 cm
  2. 20 cm
  3. 40 cm
  4. 5 cm
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Correct answer: A. 10 cm

1. Use R = 2f, so f = R/2. 2. Substitute R = 20 cm to get f = 10 cm. 3. The principal focus is 10 cm in front of the pole. _Source: syllabus Science, Ch 9 "Light Reflection and Refraction", §9.2_

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