Visible Light

QUESTION 1

1. How much insolation does the Earth’s surface receive at night?
2. A.90% of the daytime value
3. B.50% of the daytime value
4. C.10% of the daytime value
5. D.0% of the daytime value
6. E.-10% of the daytime value

QUESTION 2

1. A warmer body emits more energy than a cooler body does if all other factors are the same. Even during the summer time, the sky is very cold (see the table in the Lab Document), while the ground surface gets really hot. Which one of the followings emits more energy?
2. A.Ground surface
3. B.Sky

QUESTION 3

1. The average Earth’s surface temperature is 288 K. The wavelength of peak emission of radiation from the Earth’s surface is _____ µm.

QUESTION 4

1. If the temperature of an object is 1811 K (melting point of iron), the wavelength of peak emission of radiation from this object is _____ µm. Enter a numerical value with two decimal places.

QUESTION 5

1. If the temperature of an object is 8000 K, the wavelength of peak emission of radiation from this object is 0.3623 µm. What part of electromagnetic spectrum does this wavelength of peak emission fall?
2. A.Near infrared
3. B.Thermal infrared
4. C.Visible light
5. D.Ultraviolet