5 Questions

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Use the graphic to the left to help solve theses problems

• 1.
What is a black body?
• A.

A theoretical object that absorbs 100% of light incident upon it and then reradiates it

• B.

• C.

A greater intensity of light incident on a metal resulted in more electrons being emitted from the metal

• D.

A photon is emitted when the electron jumps down in energy

• 2.
The amount of blue light (475 nm) in this spectra is most closely
• A.

.45 nW/m^2 μm

• B.

50 nW/m^2 μm

• C.

1.0 nW/m^2 μm

• D.

6 nW/m^2 μm

• E.

20 nW/m^2 μm

• 3.
The wavelength that produces the maximum amount of light (λmax) in this spectra is most closely:
• A.

.45 μm

• B.

50 nW/m^2 μm

• C.

.7 μm

• D.

1 μm

• E.

2 μm

• 4.
Let Fλ(B) denote the amount of blue light (475 nm) and Fλ(R) denote the amount of red light (650 nm). Which of the following is correct?
• A.

Fλ(B) < Fλ(R)

• B.

Fλ(B) = Fλ(R)

• C.

Fλ(B) > Fλ(R)

• 5.
The ratio of the amount of blue light to the amount of red light, Fλ(B)/Fλ(R), is most closely:
• A.

.2

• B.

.6

• C.

1.5

• D.

6

• E.

10

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