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प्रश्न
What kind of mirror is required for obtaining a virtual image of the same size as the object?
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उत्तर
A plane mirror is required in order to obtain a virtual image of the same size as the object, as this is one of the properties of a plane mirror.
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संबंधित प्रश्न
Explain the following term related to spherical lenses:- principal focus
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
Complete the following sentence:
All the distances are measured from the .......... of a spherical mirror.
The shiny outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror:
Which type of spherical mirror will it provide?
A concave lens produces an image 20 cm from the lens of an object placed 30 cm from the lens. The focal length of the lens is:
(a) 50 cm
(b) 40 cm
(c) 60 cm
(d) 30 cm
A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel.
How is the focal length of a spherical mirror related to its radius
Which are the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain with the help of suitable ray diagrams.
An optical device has been given to a student and he determines its focal length by focusing the image of the sun on a screen placed 24 cm from the device on the same side as the sun. Select the correct statement about the device.
(A) Convex mirror of focal length 12 cm
(B) Convex lens of focal length 24 cm
(C) Concave mirror of focal length 24 cm
(D) Convex lens of focal length 12 cm
Why does a driver use a convex mirror instead of a plane mirror as a rear view mirror?
Illustrate your answer with the help of a ray diagram.
The radius of curvature of a convex mirror is 40 cm. Find its focal length.
The magnification for a mirror is -3. How are u and v related?
At what distance from a concave mirror of focal length 25 cm should an object be placed so that the size of image is equal to the size of the object.
Draw a ray diagram in each of the following cases to show the formation of image, when the object is placed :
(i) between the optical centre and principal focus of a convex lens.
(ii) anywhere in front of a concave lens.
(iii) at 2F of a convex lens.
State the signs and values of magnifications in the above-mentioned cases (i) and (ii).
Define the following term:
spherical mirror
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
An object is placed in front of a concave mirror as shown in the following figure. By scale drawing, find the nature of the image. Given f = 10 cm, v = 30 cm.
A converging lens of focal length f is placed at a distance 0.3 m from an object to produce an image on a screen 0.9 m from the lens. With the object and the screen in the same positions, an image of the object could also be produced on the screen by placing a converging lens of focal length.
