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WorksheetsEM waves
Total questions: 15
Worksheet time: 6mins
1. In the electromagnetic spectrum, which of the following has the longest wavelength?
gamma rays
microwaves
radio waves
X-rays
2. To what thing can we compare the length of the wavelengths of gamma rays?
atomic nuclei
butterfly
human
virus
3. Using the Basic Wave Equation, how is frequency of a wave related to its wavelength? A high frequency wave will have a ____________________.
longer wavelength
shorter wavelength
faster wave speed
slower wave speed
4. Which electromagnetic waves are used for remote controls, for television, for burglar alarm systems and for night vision?
gamma rays
infrared rays
microwaves
radio waves
5. Ultraviolet radiation is used to detect fake money and sterilize medical equipment. Which of the following is the main source of UV radiation on Earth?
comet
moon
ozone layer
sun
6. Why are babies exposed to sunlight early in the morning for 5-10 minutes? It is because...
the sun's gamma rays help babies to develop healthy skin
sunlight has UV rays that help babies to develop healthy skin
UV rays from the sun help the body produce vit. D for healthier bones
gamma rays from the sun help the body produce vit. D for healthier bones
7. How does a microwave oven cook food? It cooks food by ______________.
heating the container carrying the food
transferring energy to the water molecules in the food
having waves reflected in the oven to produce standing waves
transferring energy to the molecules on the surface of the food
8. Which factor contributes to usefulness of gamma rays in treating-cancer cells? Gamma rays have frequencies thus having ________ energy allowing it to be penetrating.
changing
constant
high
low
9. What is the wavelength of the wave with a frequency of 3 x 10 9 Hz?
1.0 x 10 -1 m
1.0 x 101 m
1.0 x 10 -2m
1.0 x 10 2 m
10. Which explains the importance of knowing electromagnetic waves? It ___________.
helps us to listen to a radio
makes our lives livelier and easier
facilitates attachment to our loved ones far from us
increases our awareness on its usefulness and effects
11. What electromagnetic wave is sometimes called heat rays?
gamma rays
infrared
radio waves
visible light
Frequency and wavelength are (a) proportional.
EM waves can travel through a (a) .
14. EM waves have an electric field that travels (a) with the magnetic field.
15. (a) formulated the Electromagnetic wave theory which says that oscillating electric current should be capable of radiating energy in the form of EM waves.
