Infra-red rays are________.A. Longitudinal wavesB. Transverse wavesC. – McqOptions

MCQOPTIONS

1.	Infra-red rays are________.A. Longitudinal wavesB. Transverse wavesC. Mechanical wavesD. Electromagnetic waves
A.	C
B.	D
C.	A
D.	B
Answer» C. A

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