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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
How will you explain the statement 'we cannot see the objects in a dark room'?
Differentiate between the reflection of light from a plane mirror and that from a plane sheet of paper.
A light ray is incident normally on a plane mirror. What is the direction of reflected ray? Show it on a diagram.
You are provided a convex mirror, a concave mirror and a plane mirror. How will you distinguish between them, without touching or using any other apparatus?
What is a real image?
An object OA is placed on the principal axis of a concave mirror as shown in the figure. Copy and complete the diagram to show the formation of image.
State whether the following statement is true or false. If false, correct it.
The image formed in a plane mirror is the real, erect, and same size as that of the object.
Find the odd one.
glass bottle, exam pad, paper plate, wooden board
Plane mirrors are used as looking glass, to reflect light on objects and in periscopes.
The angle of incidence is equal to the angle of reflection for perfect reflection.
