Advertisements
Advertisements
Question
State the kind of mirror used
(a) By a dentist,
(b) As a search-light reflector.
Advertisements
Solution
(a) Concave mirror
(b) Concave mirror
APPEARS IN
RELATED QUESTIONS
Explain the following term related to spherical lenses:- centres of curvature
A student obtained a sharp image of a burning candle, placed at the farther end of a laboratory table, on a screen using a concave mirror. For getting better value of focal length of the mirror, the subject teacher suggested him for focusing a well illuminated distant object. What should the student do?
(A) He should move the mirror away from the screen.
(B) He should move the mirror slightly towards the screen.
(C) He should move the mirror as well as the screen towards the newly selected object.
(D) He should move only the screen towards the newly selected object.
Name the two kinds of spherical mirrors and distinguish between them.
Upto what maximum distance from a concave mirror, the image can be obtained? What will be the location of object for it?
For an incident ray directed towards centre of curvature of a spherical mirror the reflected ray:
Draw a ray diagram to show that a convex mirror has a wider field of view.
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?
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
A ray of light is incident towards a plane mirror at an angle of 30° with the mirror surface. What will be the angle of reflection?
