Question

An open box is made of iron whose external dimensions are 45 cm, 36 cm and 495 cm. If the
thickness of iron is 3 cm throughout,
(i) How many cubic cm of iron is there in the box?
(ii) Find the weight of the iron, if 50 cm? of iron weighs 4 gms.​

Answer 1

Answer:

• Concave mirror converges the light rays to a single direction which cause excess heat but in case of convex mirror the light rays falling on it gets diverged and thus cannot point on any one direction. ... So convex mirrors cannot burn paper like concave mirrors.

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