In the constellation Orion, you can easily observe the differencebetween the red

Question

In the constellation Orion, you can easily observe the differencebetween the reddish looking star Betelgeuse and the bluish lookingstar Rigel. Which of the two has the cooler surface temperature?

A)Rigel
B)Betelgeuse
C)There is no way to tell. Hint: Wien’s law: max =3*106/T. The lower the temperature T, the longer isthe wavelength max where most of the light isemitted. Red light has longer wavelength than bluelight.

A)Rigel
B)Betelgeuse
C)There is no way to tell. Hint: Wien’s law: max =3*106/T. The lower the temperature T, the longer isthe wavelength max where most of the light isemitted. Red light has longer wavelength than bluelight.
Hint: Wien’s law: max =3*106/T. The lower the temperature T, the longer isthe wavelength max where most of the light isemitted. Red light has longer wavelength than bluelight.

Explanation / Answer

A)Rigel
B)Betelgeuse
C)There is no way to tell. Hint: Wien’s law: max =3*106/T. The lower the temperature T, the longer isthe wavelength max where most of the light isemitted. Red light has longer wavelength than blue light.
option B is correct.

Hint: Wien’s law: max =3*106/T. The lower the temperature T, the longer isthe wavelength max where most of the light isemitted. Red light has longer wavelength than blue light.
option B is correct.

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