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प्रश्न
Draw and complete the following diagrams to show what happens to the beams of light as they enter the glass block and then leave it:
उत्तर
When a beam of light rays enters the glass block, it gets refracted. It bends towards the normal. Also, when these light rays leave the block, they bend away from the normal.
When light rays fall normally on the surface of the glass block, there is no bending of rays; the rays travel straight.
संबंधित प्रश्न
A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be ______.
An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen be placed, so that a sharp focused image can be obtained? Find the size and the nature of the image.
Which kind of mirror is used in the headlights of a car? Why is it used for this purpose?
A concave mirror produces three times enlarged virtual image of an object placed at 10 cm in front of it. Calculate the radius of curvature of the mirror.
An object is placed 15 cm from (a) a converging mirror, and (b) a diverging mirror, of radius of curvature 20 cm. Calculate the image position and magnification in each case.
Explain the images formed by a concave mirror.
The radius of curvature of a concave mirror whose focal length is 5cm is ______
Concave mirrors are used by dentists to examine teeth. Why?
Under which of the following conditions a concave mirror can form an image larger than the actual object?
Which type of mirror is used in the following?
Shaving mirror
