Q1 of 36 Page 283

Name the type of mirror used as shaving mirror.

Concave mirrors are used as shaving mirrors to see a large image of the face and make a good shave. When the face is held within the focus of a concave mirror (not on the focus) then the enlarged image can be seen in the concave mirror.


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2

What does the negative sign in the value of magnification produced by a mirror indicates about an image?

 3

If you want to see an enlarged image of your face, will you use a concave mirror or a convex mirror?

 4

In which of the following media: glass, water and diamond

(a) Light travels slowest.


(b) Light travels fastest.

 5

Given below are refractive indices of a few material media.

Rock salt - 1.54


Ice - 1.31


Dense flint glass - 1.65


Crown glass - 1.52


Arrange the media in the ascending order of optical density.