Advertisements
Advertisements
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.
Advertisements
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 following term in the context of spherical mirrors:- Principal axis
What type of image is formed:
- in a plane mirror?
- on a cinema screen?
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
Define (a) centre of curvature (b) radius of curvature (c) pole (d) principal axis, and (e) aperture, of a spherical mirror with the help of a labelled diagram
Write the spherical mirror's formula and explain the meaning of each symbol used in it.
A point light source is kept in front of a convex mirror at a distance of 40 cm. The focal length of the mirror is 40 cm. Find the position of image.
Define the following term in relation to concave mirror.
Radius of curvature
Define linear magnification produced by a mirror?
AB is the object, A'B' is the image, and MM' is the position of the mirror. Complete the ray diagram showing the formation of the image and find the focal length of the mirror.
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
