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प्रश्न
The shiny outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror:
What will be the focal length of this mirror?
उत्तर
संबंधित प्रश्न
A 4 cm tall object is placed on the principal axis of a convex lens. The distance of the object from the optical centre of the lens is 12 cm and its sharp image is formed at a distance of 24 cm from it on a screen on the other side of the lens. If the object is now moved a little away from the lens, in which way (towards the lens or away from the lens) will he have to move the screen to get a sharp image of the object on it again? How will the magnification of the image be affected?
Image formed by a convex ______ is always virtual and smaller in size.
An image formed by a ______ mirror is always of the same size as that of the object.
Write the formula for a lens connecting image distance (v), object distance (u) and the focal length (f). How does the lens formula differ from the mirror formula?
Define the following term:
convex mirror
Define the following term in relation to concave mirror.
Pole
An object is placed at a distance of 0.25 m
in front of a plane mirror. The distance between the object and image will be ______.
For a spherical mirror, ______ is true.
