(a) We feel the warmth of the sun light but not the pressure on our hands. Explain.

(b) Which out of wavelength, frequency and speed of an electro-magnetic wave does not change on passing from one medium to another ?

(c) A thin ozone layer in the upper atmosphere is crucial for human survival on earth, why ?

 

 
 
 
 
 

Answers (1)
S safeer

(a) It is because the momentum transferred to our hands is extremely small. Hence we do not feel the pressure,
(b) frequency
(c) ozone layer prevents UV rays to penetrate the earth’s atmosphere.

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