Advertisements
Advertisements
प्रश्न
Define the term Principle focus.
Advertisements
उत्तर
Principal focus of a spherical mirror is a point on the principal axis of the mirror, where all the rays travelling parallel to the principal axis and close to it after reflection from the mirror, converge to or appear to diverge from.
APPEARS IN
संबंधित प्रश्न
We can obtain an enlarged and erect image by a convex mirror.
A ray of light is incident on a plane mirror at an angle of 30°. What is the angle of reflection
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
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
What name is given to the distance between spherical mirror and carbon paper?
Draw a ray diagram to show the formation of the image, when the object is placed between optical centre and principal focus of a convex lens.
State the signs and values of magnifications in the above mentioned case.
An object 10 cm high is placed at a distance of 20 cm in front of a spherical mirror of focal length 25 cm. By scale drawing find the nature, position, and magnification of the image in the following case:
Concave mirror
The spherical mirror used as a rear view mirror in the vehicle is
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
