13 Electromagnetic Spectrum 2019 J & 2020 J/N

Quiz
•
Physics
•
10th Grade
•
Hard
Lee Peng TUNG
FREE Resource
11 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An eclipse of the Sun happens when the Moon comes between the Earth and the Sun.
Which statement is correct?
Infra-red radiation from the Sun disappears before visible light and ultra-violet radiation.
Ultra-violet radiation from the Sun disappears before visible light and infra-red radiation.
Visible light from the Sun disappears before ultra-violet radiation and infra-red radiation.
Infra-red radiation, ultra-violet radiation and visible light from the Sun all disappear at the same moment.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement about microwaves is correct?
Microwaves are longitudinal waves.
The frequencies of microwaves are greater than the frequencies of visible light.
The speed of microwaves in a vacuum is equal to the speed of visible light in a vacuum.
The wavelengths of microwaves are smaller than the wavelengths of infra-red.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the speed of X-rays in a vacuum and in air?
in a vacuum: 3.0 × 10^6 m/s, in air: 3.0 × 10^6 m/s
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The diagram shows the electromagnetic spectrum. A word is missing from the label below the spectrum. Which word is missing?
amplitude
frequency
speed
wavelength
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The wavelength of blue light changes from 4.7 × 10⁻⁷ m to 3.5 × 10⁻⁷ m as it passes from air to water. What is the speed of this light in water?
7.4 × 10⁷ m/s
1.3 × 10⁸ m/s
2.2 × 10⁸ m/s
3.0 × 10⁸ m/s
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An intruder alarm sensor detects that a person is warmer than his surroundings. Which type of electromagnetic wave does the sensor detect?
infrared
radio
ultraviolet
visible light
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The frequency of the microwaves used in a microwave oven is 2400 MHz. What is the wavelength of these microwaves?
0.125 m
8.00 m
125 m
7200 m
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