Question 1
1
Question 1(b)
1(b)
An electromagnetic wave has frequency 12 THz .
Question 1(b)(ii)
1(b)(ii)
State the name of the region of the electromagnetic spectrum for this frequency.
Answer
infra-red/IR
Question bank
A-Level CAIE Physics 7 4 Electromagnetic Spectrum Question Bank
Practice A-Level CAIE Physics 7 4 Electromagnetic Spectrum questions by syllabus topic with past-paper context, marks, difficulty and question previews on Eduninja.
Question 1
1
What is the best estimate of the wavelength of green light? 260 nm 540 nm 780 nm 920 nm
Answer
B
Question 22
22
Which statement about electromagnetic radiation is correct? Waves of wavelength \(5 \times 10^{-9} \mathrm{~m}\) are high-energy gamma rays. Waves of wavelength \(3 \times 10^{-8} \mathrm{~m}\) are ultra-violet waves. Waves of wavelength \(5 \times 10^{-7} \mathrm{~m}\) are infra-red waves. Waves of wavelength \(9 \times 10^{-7} \mathrm{~m}\) are light waves.
Answer
B
Question 22
22
Which statement about different types of electromagnetic wave is correct? The frequency of infra-red waves is less than the frequency of blue light. The frequency of radio waves is greater than the frequency of gamma rays. The wavelength of red light is less than the wavelength of ultraviolet waves. The wavelength of X-rays is greater than the wavelength of microwaves.
Answer
A
Question 5
5
Question 5(b)
5(b)
A space telescope is designed to detect electromagnetic radiation with wavelengths in the range \(12 \mu \mathrm{~m}\) to \(28 \mu \mathrm{~m}\). State the region of the electromagnetic spectrum for this radiation.
Answer
infrared B1
Question 23
23
An electromagnetic wave has a wavelength of 2.1 cm in a vacuum. Which region of the electromagnetic spectrum contains this wave? infrared microwave radio wave visible light
Answer
B
Question 23
23
The order of magnitude of the frequency of the longest-wavelength ultraviolet waves can be expressed as \(10^{x} \mathrm{~Hz}\). What is the value of x ? 13 15 17 19
Answer
B
Question 23
23
Which statement about electromagnetic waves in a vacuum is correct? Amplitude is inversely proportional to velocity. Frequency is inversely proportional to wavelength. Intensity is proportional to amplitude. Velocity is proportional to wavelength.
Answer
B
Question 23
23
A student is investigating two electromagnetic waves, X and Y, in a vacuum. Wave X has a wavelength of \(5.2 \times 10^{-7} \mathrm{~m}\). Wave Y has a frequency of 9.4 GHz . Which principal regions of the electromagnetic spectrum contain waves X and Y ?
Answer
C
Question 23
23
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? all arrive at the same time blue first, then green, then red red first, then blue, then green red first, then green, then blue
Answer
A