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CBSE 10th Standard Science Subject Light Reflection and Refraction Ncert Exemplar 2 Mark Questions With Solution 2021

Published on: 26/05/2021

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Questions:

Generic 2

4 x 2 = 8

List four specific characteristics of the images of the objects formed by convex mirrors.

State two positions in which a concave mirror produces a magnified image of a give object. List two different between the two images.

List four characteristics of the images formed by plane mirrors.

A ray of light falls normally on the surface of a transparent glass slab. Draw a ray diagram to show its path and also mark angle of incidence and angle of emergence.

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Answers Key:

Generic 2

4 x 2 = 8

The images of the objects formed by convex mirrors are always
(i) virtual
(ii) erect
(iii) diminished and
(iv) formed behind the mirror between focus and pole of the mirror.

(i) When an object is placed between the pole (p) and focus (f) of a concave mirror, the image formed is larger than the Object (or magnified).
(ii) When an object is placed between the focus (f) and centre of curvature (c) of a concave mirror, the image formed is larger than the object.
Difference between the two images

In case (i), the image is formed behind the mirror	In case (ii), the image is formed beyond the centre of curvature.
In case (i), the image formed is virtual and erect.	In case (ii), the image formed is real and inverted.

(i) The image formed by a plane mirror is virtual and erect. It cannot be received on a screen.
(ii) The image formed by a plane mirror is of the same size as the object.
(iii) The image formed by a plane mirror is at the same distance behind the mirror as the object is in front of the mirror.
(iv) The image formed in a plane mirror is laterally inverted.