A solid body is heated upto very high temperature As we go on heating its brightness increases and it appears white at the end The sequence of the colour observed as the temperature of the body increases will be-

Yellow, green, red, white

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Green, yellow, red, white

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Red, green, yellow, white

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Red, yellow, green, white

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Solution

The correct option is A Yellow, green, red, white
By heating metal sufficient energy is provided for the excitation of electron from specific orbital to another high energy orbital. As the temperature of the body increases the frequency of emitted radiation also increases that's why one sees a variety of colors as the body gets raised to higher temperature.
The correct order of increasing frequency from lower to higher is Yellow<Green<Red<White.

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Similar questions

The elements of sets A , B and C are all colours as follows:

A = { Red , Orange , Yellow , Brown } ,

B = { Blue , Yellow , Green , Brown } ,

C = { Black , Brown , White , Grey }

Then, A U B U C is

Statements

I.Some yellow are red.

II.No red is green.

Conclusions

I.Some red are yellow.

II.Some green are yellow.

III.Some yellow are not green.

IV.All green are yellow.

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