Question

1. As the temperature of a backbody increases, the wavelength of the peak in the emitted intensity

		remains the same.
		shifts to higher values.
		shifts to lower values.
		becomes unstable.

QUESTION 2

1. Max Planck discovered the theoretical reasoning necessary to understand the spectrum of the electromagnetic radiation emitted by a blackbody. What was this reasoning based on?

		A careful consideration of the possible physical effects.
		Guessing until he found an expression which led to the correct result.
		Don't select this answer.
		Don't select this answer.

QUESTION 3

1. Which blackbody emits more energy, one at 3000 K or one at 6000 K?

		3000 K
		6000 K
		They both emit the same amount of energy.
		Neither emit any energy.

Answer 1

QUESTION 1:

According to Wien's displacement law, As the temperature of a backbody increases, the wavelength of the peak in the emitted intensity will decrease.

• Correct answer is : shifts to lower values.

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QUESTION 2:

• Correct answer is : A careful consideration of the possible physical effects.

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QUESTION 3:

More radiation is emitted by the blackbody at a higher temperature.

• Correct answer is : 6000 K