Name ______ KEY ___________________________________ Date _________ Period ______
The Electromagnetic Spectrum – Part 2
1.
Circle the type of EM radiation with the highest energy.
a. Blue Light
Yellow Light
Violet Light
b. Micro Waves
Ultraviolet Rays
Green Light
2.
If energy is added to a wave:
3.
a. What happens to the wavelength?
 The wavelength decreases with higher energy.
b. What happens to the frequency?
 The frequency increases with higher energy.
Find the energy of a wave with a frequency of 4.99 x 109 Hz.
E = hv = (6.626 x 10-34 J·s)(4.99 x 109 Hz) = 3.31 x 10-24 J
4.
Find the frequency of a wave with 3.512 x 10-22 J of energy.
h
5.
Find the energy of a wave with a wavelength of 9.33 x 10-9 m.
hc
6.
If hydrogen emits blue light at 7.32 x1016 Hz, how much energy is there in each photon?
E = hv = (6.626 x 10-34 J·s)(7.32 x 1016 Hz) = 4.85 x 10-17 J
7.
8.
Is matter a wave or a particle? Explain.
 Matter shows a wave-particle duality. It has properties of both. This is the
basis of quantum mechanics.
Explain the contributions from each scientist to the quantum mechanical model:
a. Planck.
 Energy comes in little
“packets” – a quantum.
b. Hertz.
c. Einstein.
 Radiation is stream of
particles – photons.
d. Schrodinger.

9.
Discovered that energy
 Equation shows
could replace matter –
probable location of
Photoelectric effect.
electron in atom.
-19
If it takes 8.17 x 10 J of energy to remove an electron from gold, what is the
wa elength of light needed? Hint: U e both
h and c
h
H
c
H