(a)
An electromagnetic wave has frequency 12 THz .
[ 1 ]
(i)
State the name of the region of the electromagnetic spectrum for this frequency.
[ 1 ]
[Maximum number: 1]
What is the best estimate of the wavelength of green light?
A
260 nm
B
540 nm
C
780 nm
D
920 nm
[Maximum number: 1]
Which statement about electromagnetic radiation is correct?
A
Waves of wavelength 5×10−9 m are high-energy gamma rays.
B
Waves of wavelength 3×10−8 m are ultra-violet waves.
C
Waves of wavelength 5×10−7 m are infra-red waves.
D
Waves of wavelength 9×10−7 m are light waves.
[Maximum number: 1]
Which statement about different types of electromagnetic wave is correct?
A
The frequency of infra-red waves is less than the frequency of blue light.
B
The frequency of radio waves is greater than the frequency of gamma rays.
C
The wavelength of red light is less than the wavelength of ultraviolet waves.
D
The wavelength of X-rays is greater than the wavelength of microwaves.
(a)
A space telescope is designed to detect electromagnetic radiation with wavelengths in the range 12μ m to 28μ m.
State the region of the electromagnetic spectrum for this radiation.
[ 1 ]
[Maximum number: 1]
An electromagnetic wave has a wavelength of 2.1 cm in a vacuum.
Which region of the electromagnetic spectrum contains this wave?
A
infrared
B
microwave
C
radio wave
D
visible light
[Maximum number: 1]
The order of magnitude of the frequency of the longest-wavelength ultraviolet waves can be expressed as 10x Hz.
What is the value of x ?
A
13
B
15
C
17
D
19
[Maximum number: 1]
Which statement about electromagnetic waves in a vacuum is correct?
A
Amplitude is inversely proportional to velocity.
B
Frequency is inversely proportional to wavelength.
C
Intensity is proportional to amplitude.
D
Velocity is proportional to wavelength.
[Maximum number: 1]
A student is investigating two electromagnetic waves, X and Y, in a vacuum.
Wave X has a wavelength of 5.2×10−7 m. Wave Y has a frequency of 9.4 GHz .
Which principal regions of the electromagnetic spectrum contain waves X and Y ?
X
Y
radio wave
ultraviolet
ultraviolet
visible
visible
microwave
microwave
radio wave
[Maximum number: 1]
Brief pulses of red, blue and green light are emitted from the Sun at the same time.
The pulses travel the same distance to reach Mars. Assume that the pulses travel in a vacuum for the full duration of their journey.
In which order would these pulses of light arrive at Mars?
A
all arrive at the same time
B
blue first, then green, then red
C
red first, then blue, then green
D
red first, then green, then blue
0