The star Betelgeuse is red. Our sun is yellow. Sirius is blue. The planet Jupiter emits infra-red radiation. Of these objects, the highest surface temperature is on

(A) Betelgeuse.
(B) Our sun.
(C) Sirius.
(D) Jupiter.

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The star Betelgeuse is red. Our sun is yellow. Sirius is blue. The planet Jupiter emits infra-red radiation. Of these objects, the highest surface temperature is on

(A) Betelgeuse. --- No.

Red light has lower frequency than yellow.


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The star Betelgeuse is red. Our sun is yellow. Sirius is blue. The planet Jupiter emits infra-red radiation. Of these objects, the highest surface temperature is on

(B) Our sun. --- No. Yellow light does not

have the highest frequency on the list.


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The star Betelgeuse is red. Our sun is yellow. Sirius is blue. The planet Jupiter emits infra-red radiation. Of these objects, the highest surface temperature is on

(C) Sirius. --- Yes. Blue light has the highest

frequency, so it's the hottest.


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The star Betelgeuse is red. Our sun is yellow. Sirius is blue. The planet Jupiter emits infra-red radiation. Of these objects, the highest surface temperature is on

(D) Jupiter. --- No. Infra-red radiation

has lower frequency than visible light.


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