Exploring Wein's Law and Luminosity

What does Wien's Displacement Law relate to in terms of black body radiation?

• The total energy emitted by a black body

• The peak wavelength of emission and temperature

• The colour of the black body

• The speed of light

Which of the following best describes a black body?

• An object that reflects all incident light

• An object that absorbs all incident radiation

• An object that emits only visible light

• An object that is transparent to all radiation

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NGSS.HS-PS4-4

According to Wien's Displacement Law, what happens to the peak wavelength as the temperature of a black body increases?

• It remains constant

• It increases

• It decreases

• It becomes infinite

What is the formula for Wien's Displacement Law?

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NGSS.HS-PS4-3

NGSS.HS-PS3-4

What is the constant 'b' in Wien's Displacement Law approximately equal to?

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NGSS.HS-PS4-3

NGSS.HS-PS4-1

Which law is used to calculate the luminosity of a star?

• Newton's Law of Gravitation

• Stefan-Boltzmann Law

• Ohm's Law

• Hooke's Law

What is the formula for the Stefan-Boltzmann Law?

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NGSS.HS-PS3-4

• The speed of light

• The proportionality constant in the Stefan-Boltzmann Law

• The gravitational constant

• The Planck constant

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NGSS.HS-PS4-3

NGSS.HS-PS3-4

How does the luminosity of a star change if its temperature is doubled, assuming its radius remains constant?

• It remains the same

• It doubles

• It increases by a factor of 16

• It decreases by a factor of 4

Which of the following is an application of Wien's Law?

• Determining the age of the universe

• Measuring the temperature of stars

• Calculating the speed of sound

• Estimating the mass of planets