Question

which of the following waves has the longest wavelength.

A. Gamma rays
B. Infra-red
C. Ultraviolet
D. X-rays​

Answer 1

Answer:

Infra-red

Explanation:

Gamma rays < X-rays < Ultraviolet light < visible light < infrared < microwaves < radio waves.

Answer 2

Answer:

Gamma rays < X-rays < Ultraviolet light < visible light < infrared < microwaves < radio waves. The order of the frequencies these waves is the reverse of the above order. Therefore, the radio waves have the longest wavelength amongst the EM waves, which range from millimetres to kilometres.

Explanation:

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