1. Electromagnetic waves are
a. longitudinal b. transverse.
c. both longitudinal & transverse. d. None
2. Which electromagnetic wave carries more energy than the others?
a. microwaves b. radio waves C. UV radiation d. visible light
3. What type of waves is used to transmit cellular telephone messages?
a. Gamma rays b. Radio waves
c. Microwaves d. Visible light
4. Which electromagnetic waves have the shortest wavelengths and highest frequencies?
a. Gamma rays b. Radio waves c. X-rays
d. Ultraviolet rays
5. Which electromagnetic waves are visible, therefore called as the visible spectrum?
a. Infrared rays b Microwaves c. X-rays
d. Visible light
6. Which electromagnetic wave has the longest wavelength?
a. gamma rays
b. infrared
c. radio waves
d. visible light
7. All electromagnetic waves travel through a vacuum at
a. the same speed.
b. speeds that are proportional to their frequency
c. speeds that are inversely proportional to their frequency
d. None of the above.
c. magnetism
d. radiation
8. What is transferred by electromagnetic waves?
a. Sound
b. electricity
b.
9. Electromagnetic waves travel
a. without a medium
b. with medium
c. with medium & without medium
d. in a disturbed path
10. What is the frequency range of UV radiation?
a. 3.5 x 10° -3 x 1011 Hz
b. 3.5 x 1011 - 3 x 10"4 Hz
c. 7.5 x 10"- 3 x 10 Hz
d.7.5 x 1015 - 3 x 10" Hz
11. What is the range of frequencies are our eyes sensitive to?
a. 3 x 10° - 3 x 1011 Hz
c. 44 1011 - 75 x 2014 HZ
b. 3 x 1011 - 4 x 104 Hz
d. 7.5 x 10²4 .3 x 10 Hz
12. What is the wavelength of the wave with a frequency of 5 x 10° Hz?
a. 16.67mm
b. 16.67cm
C. 16.67m
d. 167m​