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Question

Physics Question on Electromagnetic waves

Which of the following is the infrared wavelength?

A

10−4cm10^{-4} cm

B

10−5cm10^{-5} cm

C

10−6cm10^{-6} cm

D

10−7cm10^{-7} cm

Answer

10−4cm10^{-4} cm

Explanation

Solution

The wavelength of infrared region is 8×10−5cm8 \times 10^{-5} cm to 3×10−3cm3 \times 10^{-3} cm. So maximum wavelength of infrared region =8×10−5cm≈10−4cm=8 \times 10^{-5} cm \approx 10^{-4} cm.