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प्रश्न
Why does a driver use a convex mirror instead of a plane mirror as a rear view mirror?
Illustrate your answer with the help of a ray diagram.
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उत्तर
A convex mirror diverges the incident beam and always forms a virtual, small and erect image between its pole and focus. Thus, a driver can see all the traffic approaching from behind. This fact enables the driver to use it as a rear view in vehicles to see all the traffic approaching from behind.
संबंधित प्रश्न
Explain the following term related to spherical lenses:- principal focus
A diverging lens is used in:
(a) a magnifying glass
(b) a car to see objects on rear side
(c) spectacles for the correction of short sight
(d) a simple camera
State the kind of mirror used
(a) By a dentist,
(b) As a search-light reflector.
The focal length of a concave mirror is 10 cm. Find its radius of curvature.
An object 5 cm high is placed at a distance 60 cm in front of a concave mirror of focal length 10 cm. Find the position and size of the image.
Define the following term:
concave mirror
Find the height of the image of a body of height 1.5m in a mirror with a magnification of 1.5.
How tall does a mirror have to be to fit an entire person’s body?
