Advertisements
Advertisements
Question
The erect image formed by a concave mirror is of size double the size of object. How are u and v related?
Advertisements
Solution
Magnification is
m = `"I"/"O" = 20/"O" = 2`
∵ m = `-"v"/"u"`
∴ `-"v"/"u"` = 2
∴ v = -2u
But , u is always negative
∴ v = 2u
APPEARS IN
RELATED QUESTIONS
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of carbon paper for some time, a hole is burnt in the carbon paper.
- What is the nature of spherical mirror?
- Why is a hole burnt in the carbon paper?
- At which point of the spherical mirror the carbon paper is placed?
- What name is given to the distance between spherical mirror and carbon paper?
- What is the advantage of using a carbon paper rather than a white paper?
State the kind of mirror used
(a) by a dentist, and
(b) as a street light reflector.
Name the spherical mirror which (i) diverges (ii) converges the beam of light incident on it. Justify your answer by drawing a ray diagram in each case.
Define the following term in relation to concave mirror.
Focal length
Define the term Pole.
The distance from the pole to the focus is called ______.
An object is placed at a distance of 0.25 m
in front of a plane mirror. The distance between the object and image will be ______.
A spherical mirror whose reflecting surface is curved outwards is called ______ mirror.
