Which of the types of radiation listed below has a wavelength shorter than that of visible light and can cause fluorescence?

X-ray radiations

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Gamma radiations

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Ultraviolet radiations

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Infrared radiations

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Solution

The correct option is C
Ultraviolet radiations

In the given options, Only $U V$ radiation has a wavelength shorter than visible light.

The electromagnetic radiations of wavelength from 10 nm to 400 nm(shorter than that of visible light) are $U V$ radiations. It is present in sunlight and is also produced by the electric arc and sparks.

One of the properties of $U V$ radiations is that it will produce fluorescence on striking a zinc-sulphide screen. ie., in fluorescent tubes used for lighting, $U V$ radiation is produced along with the blue light that is emitted when an electric current is passed through mercury vapour.

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Which of the types of radiation listed below has a wavelength slightly shorter than that of visible light and can cause certain materials to fluorescence?

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