Which of the following are true about the infra-red radiation? i. it is invisible ii. it is called heat ray iii. its frequency is higher than that of blue light iv. it travels as a transverse wave
A.
i, ii, iii and iv
B.
i, ii, iv only
C.
i, iii, iv only
D.
ii, iii, iv only
Correct Answer: Option B
Explanation
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