Consider the following debate between two students regarding the energy given off by the Sun. Student 1: I think that the Sun gives off most of its energy at ultraviolet wavelengths because ultraviolet light is more intense than visible light and you always hear about ultraviolet light causing sunburns. Student 2: Even though UV photons are more energetic than visible photons, the Sun simply gives off fewer ultraviolet photons and gives off way more visible and infrared photons. So I think that these longer wavelength photons account for most of the energy coming from the Sun. Do you agree or disagree with either or both of these students? Explain your reasoning.
Consider the following debate between two students regarding the energy given off by the Sun. Student 1: I think that the Sun gives off most of its energy at ultraviolet wavelengths because ultraviolet light is more intense than visible light and you always hear about ultraviolet light causing sunburns. Student 2: Even though UV photons are more energetic than visible photons, the Sun simply gives off fewer ultraviolet photons and gives off way more visible and infrared photons. So I think that these longer wavelength photons account for most of the energy coming from the Sun. Do you agree or disagree with either or both of these students? Explain your reasoning.
Consider the following debate between two students regarding the energy given off by the Sun. Student 1: I think that the Sun gives off most of its energy at ultraviolet wavelengths because ultraviolet light is more intense than visible light and you always hear about ultraviolet light causing sunburns. Student 2: Even though UV photons are more energetic than visible photons, the Sun simply gives off fewer ultraviolet photons and gives off way more visible and infrared photons. So I think that these longer wavelength photons account for most of the energy coming from the Sun. Do you agree or disagree with either or both of these students? Explain your reasoning.
Solar scientists want to measure the temperature inside the sun by sending in probes. Imagine that temperature increases by 1 million◦C for every 10,000 km below the surface. A probe that can handle a temperature of x million degrees costs x³ million dollars. a. How much would it cost to measure the temperature 10,000 km down? b. How much would it cost to measure the temperature 100,000 km down? c. How much would it cost to measure the temperature 200,000 km down?
What is the wavelength in meters observed with a frequency of (4.5x10^15)?
Answer with 2 significant figures and it must be in scientific notation.
Note: Your answer is assumed to be reduced to the highest power possible.
Your Answer:
Answer
x10
units
Tutorial
Star A has a temperature of 5,000 K and Star B has a temperature of 6,000 K. At what wavelengths (in nm) will each of these star's intensity be at its maximum?
If the temperatures of the stars increase, the wavelength of maximum intensity.
What is the temperature (in K) of a star that appears most intense at a wavelength of 829 nm?
Part 1 of 4
Wien's Law tells us how the temperature of a star determines the wavelength of maximum intensity or at what wavelength the star appears brightest.
2.90 x 106
TK
If the temperature is in kelvin (K) then A is in nanometers (nm).
Anm
^A =
AB =
=
Part 2 of 4
To determine the wavelengths of maximum intensity for the two stars:
2.90 x 106
2.90 x 106
K
nm
nm
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