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प्रश्न
Define Radius of curvature of the spherical mirror
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उत्तर
The distance between the centre of curvature and between the centre of curvature and pole. It is measured in meter or cm.
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संबंधित प्रश्न
A ray of light strikes a plane mirror at an angle of 40° to the mirror surface. What will be the angle of reflection?
A ray of light is incident normally on a plane mirror. What will be the:
- angle of incidence?
- angle of reflection?
State the direction of incident ray which after reflection from a spherical mirror gets reflected along its own path. Give a reason.
State the kind of mirror used
(a) by a dentist, and
(b) as a street light reflector.
Name the kind of mirror used to obtain
(a) a real and enlarged image
(b) a virtual and enlarged image
(c) a real and diminished image, and
(d) a virtual and diminished image.
If a spherical mirror breaks, what type of mirrors are the individual pieces?
Name the kind of mirror used to obtain :
A real and enlarged image
What is meant by magnification? Write its expression. What is its sign for the (a) real (b) virtual, image?
The radius of curvature of a convex mirror is 40 cm. Find its focal length.
A concave mirror forms a virtual image of size twice that of the object placed at a distance 5 cm from it. Find:
- the focal length of the mirror
- position of image
A straight stick partly dipped in water obliquely appears to be bent at the surface of the water.
Choose the correct alternative and rewrite the following:
Mirror used by a dental surgeon is ..........................
Answer the following question:
Distinguish between the convex mirror and the concave mirror.
Select the correct option:
Looking into a mirror one finds her image diminished, the mirror is:
Define the following term:
convex mirror
Define the following term in relation to concave mirror.
Center of curvature
The diagram below shows the parallel rays incident on a convex mirror. C is the centre of the curvature of the mirror. By drawing the paths of the reflected rays, label the focus F and hence find the focal length of the mirror.
Assertion: Incident ray is directed towards the centre of curvature of spherical mirror. After reflection it retraces its path.
Reason: Angle of incidence (i) = Angle of reflection (r) = 0°
The distance from the center of curvature of the mirror to the pole is called the focal length of the mirror.
