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Which of the following statements is NOT true regarding the infrared

June 1, 2025 by rawan239

Which of the following statements is NOT true regarding the infrared radiation?

It is electromagnetic in nature

Its wavelength is larger than that of the visible light

It can travel through vacuum

It is a longitudinal wave

This question was previously asked in

UPSC Geoscientist – 2020

Download PDF Attempt Online

The statement that is NOT true regarding infrared radiation is that it is a longitudinal wave. Infrared radiation is a part of the electromagnetic spectrum. All electromagnetic waves, including visible light, radio waves, UV rays, X-rays, gamma rays, and infrared radiation, are transverse waves. In transverse waves, the oscillations (of electric and magnetic fields) are perpendicular to the direction of wave propagation. Longitudinal waves, such as sound waves in air, involve oscillations parallel to the direction of propagation.

Electromagnetic waves are transverse waves.

Infrared radiation is electromagnetic in nature, meaning it consists of oscillating electric and magnetic fields and travels at the speed of light in vacuum. Its wavelength range is typically longer than that of visible light (from about 700 nanometers to 1 millimeter). Like all electromagnetic waves, it can travel through vacuum. Infrared radiation is commonly associated with heat transfer (thermal radiation).

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