1. As the speed decreases, if we change the medium of electromagnetic waves
from air to water, the frequency
A. Also decreases
C. Remains the same
B. Also increases
2. Which of the following is NOT true for electromagnetic waves?
D. May increase or decrease
A. They can be reflected
B. They transport energy
C. They consist of changing electric and magnetic waves
D. They travel at different speeds in vacuum, depending on their frequency
3. Electromagnetic waves travel
A. With medium
B. Without medium
C. In a disturbed path
D. With medium and without medium
4. Which statement best describes a proton that is being accelerated?
A. It is attracted to other protons.
B. It produces electromagnetic radiation.
C. The magnitude of its charge increases.
D. It absorbs a neutron to become an electron.
5. What is the speed of a EM wave in a vacuum?
A. O m/s
C. 3.00 x 108 m/s
B. 1.13 x 103 m/s
D. 3.31 x 102 m/s
6. Who was this scientist famous of his theory of electromagnetism, which
showed that light was electromagnetic radiation?
A. Faraday
B. Hertz C. Maxwell
D. Oersted
7. A wave has a frequency of 5.0 x 1024 hertz in a vacuum. What is the
wavelength of this wave?
A. 1.5 x 1023 m
C. 2.0 x 10-15 m
D. 6.0 x 10-7 m
B. 1.7 x 106 m
8. Electromagnetic waves are propagated through the interaction of
A. Nuclear and electric fields
B. Electric and magnetic fields
C. Gravitational and electric fields
D. Gravitational and magnetic fields
9. How much time does it take for an EM wave to reach a subject 6.0 meters
C. 5.0 x 10-8 s
A. 2.0 x 10-7 S
D. 5.0 x 10-9 s
B. 2.0 x 10-8 S
across a room?