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Which one of the following statements with regard to the ultraviolet l

June 1, 2025 by rawan239

Which one of the following statements with regard to the ultraviolet light is not correct?

It is an electromagnetic wave.

It can travel through vacuum.

It is a longitudinal wave.

Its wavelength is shorter/smaller than that of visible light.

This question was previously asked in

UPSC CDS-2 – 2020

Download PDF Attempt Online

The statement that ultraviolet light is a longitudinal wave is not correct.

Ultraviolet (UV) light is a form of electromagnetic radiation, just like visible light, radio waves, and X-rays. All electromagnetic waves are transverse waves, meaning their oscillations are perpendicular to the direction of energy transfer (propagation). They can travel through vacuum at the speed of light. Longitudinal waves, such as sound waves, involve oscillations parallel to the direction of propagation and require a medium to travel. UV light has a shorter wavelength than visible light but a longer wavelength than X-rays and gamma rays.

UV radiation is invisible to the human eye but can cause effects like sunburn and skin cancer. It has various applications, including sterilization, medical therapy, and fluorescence. The electromagnetic spectrum is ordered by wavelength and frequency.

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