Q4 of 61 Page 64

Draw a ray diagram to show the formation of image by a concave mirror for an object placed between its pole and Principal focus and state three characteristics of the image.


When an object is placed between the principal focus (F) of the mirror and the pole of the mirror (P) then the image of the object is become on the back side of the mirror ,


YOU can see the image formation in above figure ,where the object AB is placed between focus and pole of the mirror and the image of the object AB is formed other side of the mirror .


This image will be –


• Virtual


• Large then the image


• And erect.


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2

Explain with diagrams how refraction of incident light takes place from

a) rarer to denser medium


b) denser to rarer medium


c) normal to the surface separating the two media


 3

State and verify laws of refraction using a glass slab.

 1

The radius of curvature of a convex mirror is 40 cm. Find its focal length

 2

An object of height 2 cm is placed at a distance 20 cm in front of a concave mirror of focal length 12 cm. Find the position, size and nature of the image.