When sunlight is concentrated on a piece of paper by a spherical mirror or lens, then a hole can be burnt in it. For doing this, the paper must be placed at the focus of : (a) either a convex mirror or convex lens (b) either a concave mirror or concave lens (c) either a concave mirror or convex lens (d) either a convex mirror or concave lens
Question 4
You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens. To obtain an enlarged image of an object you can use either
(a) concave mirror or convex mirror.
(b) concave mirror or convex lens.
(c) concave mirror or concave lens.
(d) concave lens or convex lens.
The image formed by a spherical mirror is virtual. The mirror will be : (a) concave (b) convex , (c) either concave or convex (d) metallic
A real and enlarged image can be obtained by using a :
(a) convex mirror
(b) plane mirror
(c) concave mirror
(d) either convex or plane mirror.