Q.

Which of the following statements about electromagnetic spectrum is not correct? 

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a

Infrared radiations have larger wavelength than cosmic rays

b

X – rays have larger wave number than microwaves 

c

The frequency of microwaves is less than that off ultraviolet rays

d

The velocity of X – rays is more than that of microwaves

answer is B.

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Detailed Solution

The order of frequency of radiation is given as γ- rays < X - rays < UV rays >Visible < IR Microwave < Radio wave

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Which of the following statements about electromagnetic spectrum is not correct?