1. Warm-Up
What is the wavelength of a wave having a frequency of 3.76 x 1014 s-1?
λ = c/ν = x 108 m/s = x 10-7 m
3.76 x 1014 s-1

2. What is the frequency of a 6.9 x 10-13 m wave?
ν = c/λ = x 108 m/s = 4.3 x 1020 s-1
6.9 x m

3. What is the wavelength of a 2.99 Hz wave?
λ = c/ν = x 108 m/s = x 108 m
2.99 Hz

4. What is the wavelength of a 1.28 x 1017 Hz wave?
λ = c/ν = x 108 m/s
1.28 x 1017 Hz  
= x 10-9 m

5. What is the wavelength of 109.6 MHz wave?
λ = c/ν = x 108 m/s
109.6 MHz =109.6 x 106 Hz  
= 2.74 m

6. What is the energy of a 7.66 x 1014 Hz wave?
E = hν = x Js x x 1014 Hz
= x J

7. What is the frequency of a wave carrying 8.35 x 10-18 J of energy?
ν = E / h = x J = x 1016 s-1
x Js

8. What is the frequency of a 1.78 x 10-15 J wave?
 ν = E / h = x J = x 1018 s-1
6.626 x 10-34J-s

9. What is the energy of a 3.12 x 1018 s-1 wave?
 E = h ν = x J-s x x 1018 s-1
= x J

10. What is the frequency of a 1.31 x 10-22 J wave? What is its wavelength?
ν = E / h = x J = = x s-1
x 10-34J-s
λ = c/ν = x 108 m/s
1.98 x 1011 s-1
= m = x 10-3 m

11. What is the wavelength of a 7.65 x 10-17 J wave?
ν = E / h = x J = x 1017 s-1
x 10-34J-s
λ = c/ν = x 108 m/s =
1.15 x 1017 s-1
 2.61 x 10-9 m

12. What is the energy of a 9,330 cm wave?
ν = c/λ = x 108 m/s x 100 cm
9,330 cm 1 m
 = 3.22 x 106 s-1
E = h ν = x J-s x x 106 s-1
= x J

13. What is the wavelength of a 1.528 x 10-13 J wave?
ν = E / h = x J = x 1020 s-1
6.626 x 10-34J-s
λ = c/ν = x 108 m/s
2.306 x 1020 s-1
= 1.30 x m

14. Which of the following types of radiation is not a part of the electromagnetic spectrum?
Microwave
X-ray
Beta ray
infrared

15. Which has the greatest energy?
Ultraviolet
Infrared
Green light
Blue light

16. Radiation with a longer wavelength have
A smaller frequency and higher energy
A smaller frequency and lower energy
A higher frequency and higher energy
A higher frequency and lower energy

17. Arrange the following electromagnetic radiations in order of decreasing wavelength (largest to smallest).
Infrared radiation from a heat lamp
Ultraviolet light form the sun
Dental X-rays
The signal from a short-wave radio station
Green light. 2 4 5 1 3

18. Compare the broadcast frequencies of the following two radio stations:
KFGE = MHz KBBK = MHz
Which has the fastest speed? KFGE KBBK SAME CAN’T TELL
A photon of which would have the higher energy? KFGE KBBK SAME CAN’T TELL