Which among the following is the source of ultraviolet rays?

Electric bulb

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Red hot ion ball

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Sodium vapour lamp

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Carbon - arc lamp

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Solution

The correct option is D
Carbon - arc lamp

An arc lamp or arc light is a lamp that produces light by an electric arc. The carbon arc light, which consists of an arc between carbon electrodes in the air. So a Carbon - arc lamp is used as a source for the high-intensity ultraviolet rays(UV).

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The source of ultraviolet light is :

(a) electric bulb (b) red hot iron ball

Write the energy transformations which take place in an electric bulb (or electric lamp).

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