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Unit 14: Light — Mcqs

10th Class Physics · Unit 14: Light

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1.What type of image is always formed by a convex mirror?

2.The optical device which uses a convex lens to magnify an object by creating a virtual image:

3.Which statement best describes the phenomenon of total internal reflection?

4.A ray of light travelling from water to air bends:

5.The optical device which works on the principle of inverting an image for projection is:

6.What happens to light when it enters an optical fibre?

7.Which of the following phenomenon explains why a pencil appears bent when partially immersed in water?

1.Which of the following is not a characteristic of an image formed by a plane mirror?

2.When light hits a rough surface like paper, what type of reflection occurs?

3.What happens to the speed of light when it passes from air into glass?

4.The bending of light as it passes from one medium to another is called:

5.According to the qualitative principle of refraction, light bends towards the normal when it:

6.Total internal reflection can only occur when light travels from:

7.Which part of an optical fibre has a higher refractive index?

8.Which of the following is a key advantage of optical fibres over copper cables?

9.A lens that is thinner at the centre and thicker at the edges is a:

10.The distance from the optical centre of a lens to its principal focus is called:

11.A lens with a focal length of -0.5 m has a power of:

12.In a myopic eye, the image of a distant object is formed:

13.Which type of lens is used to correct hypermetropia (long-sightedness)?

14.In a simple camera, the object is placed beyond 2F of the convex lens to form an image that is:

15.For a magnifying glass to produce a virtual, upright, and enlarged image, the object must be placed: