Advertisements
Advertisements
प्रश्न
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).
विकल्प
This device is a concave lens of focal length 8 cm.
This device is a convex mirror of focal length 8 cm.
This device is a convex lens of focal length 4 cm.
This device is a convex lens of focal length 8 cm.
उत्तर
This device is a convex lens of focal length 8 cm.
Explanation:
The incident rays after passing through the lens converge at the focus. So, the device 'X' is a converging or a convex lens. The distance between the lens and the screen gives the focal length of the lens.
APPEARS IN
संबंधित प्रश्न
Define the following term in the context of spherical mirrors:- Principal focus
A ray of light strikes a plane mirror at an angle of 40° to the mirror surface. What will be the angle of reflection?
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?
Upto what maximum distance from a concave mirror, the image can be obtained? What will be the location of object for it?
The erect image formed by a concave mirror is of size double the size of object. How are u and v related?
Define the following term in relation to concave mirror.
Pole
Define the following term in relation to concave mirror.
Aperture
The spherical mirror with a reflecting surface curved inward is called
