Advertisements
Advertisements
प्रश्न
A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?
पर्याय
MW
MS
SW
MW-WS
Advertisements
उत्तर
MS
Explanation:
The focal length of a concave mirror is the distance between its pole and principal focus.
That is, the distance of the image formed (screen) from the concave mirror will be equal to the focal length of the concave mirror.
APPEARS IN
संबंधित प्रश्न
A simple microscope is used by watch repairers. Give reason.
A student used a device (X) to obtain/focus the image of a well illuminated distant building on a screen (S) as shown below in the diagram. Select the correct statement about the device (X).
Explain the following terms :
Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.
State the kind of mirror used
(a) by a dentist, and
(b) as a street light reflector.
Figure shows a concave mirror with its pole at P, focus F and centre of curvature C. Draw ray diagram to show the formation of image of an object OA.
How will you distinguish between a plane mirror, a concave mirror and a convex mirror, without touching them?
Upto what maximum distance from the pole the image in a convex mirror can be obtained? what will be the location of object then ?
Define the term Pole.
Define the term Centre of curvature.
The radius of curvature of a spherical mirror is 18 cm. What is the focal length of this mirror?
