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प्रश्न
At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.
विकल्प
True
False
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उत्तर
True.
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संबंधित प्रश्न
An object is placed at a distance of 30 cm in front of a convex mirror of focal length 15 cm. Write four characteristics of the image formed by the mirror.
Explain with a suitable diagram, how a concave mirror converges a parallel beam of light rays. Mark clearly the pole, focus and centre of curvature of concave mirror in this diagram.
Draw diagram to show the action of convex mirror on a beam of parallel light rays. Mark on this diagram principal axis, focus F, centre of curvature C, pole P and focal length f, of the convex mirror.
If the focal length of a spherical mirror is 12.5 cm, its radius of curvature will be:
(a) 25 cm
(b) 15 cm
(c) 20 cm
(d) 35 cm
What is the nature of a mirror having a focal length of, +10 cm?
If a driver has one convex and one plane rear-view mirror, how would the images in each mirror appear different?
Draw a labelled ray diagram to show the formation of image in a convex-mirror when the object is at infinity. Mark clearly the pole and focus of the mirror in the diagram.
What is the effect on the size and position of the image of moving the object (i) towards the lens, and (ii) away from the lens?
A driver uses a convex mirror as a rearview mirror. Explain the reason with the help of a ray diagram.
Which type of mirror is used in the following?
Street lights
