Light and Energy Worksheet
Planck's constant is therefore 6.63x10-34 and the speed of light is 3.0x108
Table 1
Table 2
Constants & Relations
Colors, & Information
color
E = h
c = 
h = 6.63x10-34 J/Hz
c = 3.00x108 m/s
1 m = 102 cm = 109 nm
1 nm = 10-9 m
1 Hz = 1 wave/sec
 __ 1
E = h = -2.18n18 J 2
nf ni2
wavelength ()
[nm]
<400
400 to 420
420 to 490
490 to 580
580 to 590
590 to 650
650 to 700
>700
UV
violet
blue
green
yellow
orange
red
IR
frequency ()
[x1014 Hz]
>7.5
7.5 to 7.1
7.1 to 6.1
6.1 to 5.2
5.2 to 5.1
5.1 to 4.6
4.6 to 4.3
<4.3
1. Fill in the blanks in the following table:
element
carbon
Yttrium
Iron
bromine
Neon
hydrogen
Potassium
fluorine
p+
n0
e-
6
39
26
35
10
1
19
92
9
8
6
36
23
36
10
1
18
symbol atomic #
C
Y
Fe
Br
Ne
H
K
F
6
39
26
35
10
1
19
9
47
31
45
11
2
19
10
10
mass #
14
86
57
80
21
3
38
235
19
atomic weight
12.011
88.90585
55.847
79.904
20.1797
1.00794
39.0983
18.9984
2. Fill in the blanks in the following table:
particle symbol mass (amu)
proton
p+
1
o
neutron n
1
electron e
0
charge
location
+1
nucleus
0
nucleus
-1
Out side nucleus; e- cloud
3. An electron [gains, loses] energy when it emits a photon of light.
4. [Infrared, Visible, Ultraviolet] light has the highest frequency.
5. [Infrared, Visible, Ultraviolet] light has the most energy.
6. [Infrared, Visible, Ultraviolet] light has the highest wavelength.
7. [Red, Violet] light has the higher frequency.
8. [Red, Violet] light has the higher wavelength.
9. [, ] is the symbol for frequency, and [, ] is the symbol for wavelength.
charge
0
+3
+3
10
0
+1
6+
1-
10. Fill in the blanks in the following table:
"floating point"
4210
12,900
0.00038
0.0000834
659,000,000,000,000
0.000000962
scientific notation
4.21x103
1.29 x10 4
3.8x10-4
8.34 x10-5
6.59 x1014
3.0x108
9.26 x 10-7
11. Convert 522 nm to m. 5.22 x 10-7 m
12. Convert 4.44x107 m to nm. 4.44 x 1016 nm
13. What is the wavelength of a photon with frequency 5.7x1014 Hz? What color is it?
5.26 x 10-7 m green
14. What is the frequency of a photon with wavelength 6.2x10-7 m? What color is it?
4.84 Hz
IR
15. What is the energy of a photon with frequency 7.3x1014 Hz? What color is it? 4.84 x
10-19 J
violet
16. What is the energy of a photon with wavelength 600 nm? What color is it?
3.3 x 10-19 J violet
17. What is the speed of a water wave with frequency 5 waves/min and wavelength 13
m? 65 m/min
18. What is the frequency of a photon with wavelength 565 nm? What color is it?
5.3 x 1014Hz green
19. What is the frequency of a photon with energy of 6.22x10-19 J? What color is it?
9.4 x 1052 Hz
Change E to 6.22 x 10—19 J and answer is 9.4 x 1014 Hz no color - UV
20. What is the wavelength of a photon with energy 5.5x10-19 J? What color is it?
3.6 x 10-45m
Change Energy to 5.5 x 10-19 J and answer is 3.6 x 10-7 m UV
21. How does the line emission spectrum of a pure sample of an element compare with
its line absorption spectrum? Emission shows colors emitted while absorption shows
all colors but the elements colors. The elements waves will be black.
22. Whatis the energy of a photon produced by an electron moving from n=5 to n=2? 4.578 x 1017 J