Question

(ii)Give one use of totally reflecting prism.
(c) A boy weighs 480N on earth, and SON on moon,
(i) What is the mass of the body?
(ii) Give reason for the change in weight. (g=10m/s)
(d)The power of a lens is - 50
(i) Find its focal length.
(ii) Name the type of the lens.
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Answer 1

Answer:

मज्ञरे कि वे ऊं नम ऊं नमः शिवाय मंत्र है