Practice Light: Reflection, Refraction, Lenses and the Human Eye – GK Quiz with Answers – Level 1

50 questions. Choose an option and see at once whether it was right, with the correct answer and a worked solution. No timer, and nothing to submit.

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Question 1
The image formed by a plane mirror is:
Question 2
Which type of mirror is used in vehicle headlights to get a powerful parallel beam of light?
Question 3
For a spherical mirror, how is the radius of curvature (R) related to the focal length (f)?
Question 4
What is the refractive index of diamond?
Question 5
What is the speed of light in vacuum?
Question 6
A magnifying glass is a:
Question 7
A concave lens is also known as a:
Question 8
Hypermetropia (far-sightedness) is corrected using a:
Question 9
The condition in which the eye lens becomes milky and cloudy in old age is called:
Question 10
The near point of a normal eye of a young adult is about:

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