Question

55. No matter how far an object from the spherical lens the image of the object appears erect. The lens is
O a. concave
O b. convex
O c. either concave or convex
0 d. none of these
56 A thick black lauld formed by heating coal in the absence of air:​

Answer 1

Answer:

55. Option D, 56. Option C

Explanation:

55.Plane mirror and convex mirror forms a virtual image irrespective of the position of the object.

56.Coal tar is a thick black liquid formed by heating coal in the absence of air. Coal tar is used to construct road and water proofing.

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