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प्रश्न
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उत्तर
Three distinctions between light and sound waves are
(a). Light waves can travel through a vacuum while sound waves cannot.
(b). Light waves are transverse waves while sound waves are longitudinal waves.
(c). The velocity of light in air is 3 x 108 m/s while the speed of light in air is just about 330 m/s.
संबंधित प्रश्न
Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room? Explain.
Explain the following term:
Angle of reflection. Draw diagram/diagrams to show them.
State three ways in which the image formed in a plane mirror differs from the image formed in a pin hole camera.
An object 3 cm high produces a real image 4.5 cm high when placed at a distance of 20 cm from a concave mirror. Calculate:
- the position of image
- focal length of the concave mirror.
Draw a neat two ray diagram to illustrate how a concave mirror is used as a shaving mirror.
Define reflection.
Materials which reflect the light well are called ______.
The light falling on the mirror is called as ______ and the light reflected is called reflected ray.
The angle of incidence is equal to the angle of reflection for perfect reflection.
