Q2 of 25 Page 90

We can see a non-luminous object when light:

We can see a non-luminous object when light is reflected from the object towards our eye. When the light strikes a non-luminous object and is reflected back to our eye, we are able to generate an image of it.

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1

Part of the eye which controls the light entering is called

 3

Light is falling on surface S1, S2, S3 as shown in Fig.16.1.




Surfaces on which the angle of incidence is equal to the angle of reflection is/are


 4

A tiny mirror M is fixed on a piece of cardboard placed on a table. The cardboard is illuminated by light from a bulb. The position of eye with respect to position of bulb is shown in Fig.16.2 as A, B, C and D. In which position mirror will be visible?





 5

A small hole P is made in a piece of cardboard. The hole is illuminated by a torch as shown in Fig. 16.3. The pencil of light coming out of the hole falls on a mirror.


At which point should the eye be placed so that the hole can be seen?