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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
Define the Focal length of a spherical mirror
What type of image is formed:
- in a plane mirror?
- on a cinema screen?
Complete the following sentence:
All the distances are measured from the .......... of a spherical mirror.
How is a spherical mirror used to converge a beam of light at a point? Name the type of mirror used.
Name the kind of mirror used to obtain:
A real and diminished image.
The image formed by a convex mirror is
The following Figure shows a concave mirror MM' on which a ray of light incident from a point P gets reflected to meet the principle axis at O.
(a) Find, by construction, the position of the centre of curvature of the concave mirror.
(b) Write down the value for the radius of curvature of the mirror.
(c) Calculate the focal length of the mirror.
(d ) Which relation is used in deducing the focal length from the radius of curvature?
The distance from the pole to the focus is called ______.
What is the focal length (f) of a mirror?
