## We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror?

Q. 7 :- We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of…

## Which of the following lenses would you prefer to use while reading small letters found in a dictionary?

Q. 6 :- Which of the following lenses would you prefer to use while reading small letters found in a dictionary?  (a) A convex lens of focal length 50 cm. (b)…

## No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be

Q. 5 :- No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be  (a) plane. (b) concave. (c) convex. (d) either plane…

## A spherical mirror and a thin spherical lens have each a focal length of –15 cm. The mirror and the lens are likely to be

Q. 4 :- A spherical mirror and a thin spherical lens have each a focal length of –15 cm. The mirror and the lens are likely to be (a) both concave….

## Where should an object be placed in front of a convex lens to get a real image of the size of the object?

Q. 3 :- Where should an object be placed in front of a convex lens to get a real image of the size of the object?  (a) At the principal…

## The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?

Q. 2 :- The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object? (a)…

## Which one of the following materials cannot be used to make a lens?

Q. 1 :- Which one of the following materials cannot be used to make a lens?  (a) Water (b) Glass (c) Plastic (d) Clay   Answer:- (d) Clay

## Find the power of a concave lens of focal length 2 m.

Q. Find the power of a concave lens of focal length 2 m.   Answer:- Here given : Focal length of lens f = − 2 m Power of concave lens…