3.3. Electromagnetic spectrum
A subsection of Physics, 0625, through 3. Waves
Listing 10 of 141 questions
represents the seven main regions of the electromagnetic spectrum. radio waves microwaves infra-red radiation ultraviolet visible light gamma rays In , one region is not named. State the name of the radiation in this region. State which region has waves with the longest wavelength. Tick the box for the wave with the lowest speed in air. ultraviolet ultrasound visible light A group of students want to determine the speed of sound in air. Describe a method they can use. State the measurements they need to make.
0625_m18_qp_32
THEORY
2018
Paper 3, Variant 2
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represents a travelling wave at an instant in time. distance from source of waves / cm displacement / cm direction of wave travel 1.0 –1.0 Determine the amplitude of the wave. amplitude = cm Determine the wavelength of the wave. wavelength = cm It takes 2.0 s for a source to emit the wave shown in . Calculate the frequency of the wave. frequency = Hz shows the main regions of the electromagnetic spectrum. radio waves microwaves visible light waves X-rays γ-rays Two of the regions are not labelled. Add the correct label to each of the unlabelled regions by writing in each box. Describe one use of γ-rays.
0625_m20_qp_32
THEORY
2020
Paper 3, Variant 2
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Table 5.1 shows applications of regions of the electromagnetic spectrum. Complete the second column of the table with the region of the electromagnetic spectrum used for each application. Choose from the regions in this list: gamma rays infrared microwaves radio waves ultraviolet Each region may be used once, more than once or not at all. Table 5.1 application region of electromagnetic spectrum cancer treatment gamma rays Bluetooth data connection optical fibres security marking sterilising food wireless internet State the approximate speed of radio waves in air. speed = m / s shows successive crests of a wave after a plane wave has passed through a gap. On draw three successive crests before the wave reaches the gap. shows a much wider gap. A plane wave of the same wavelength as in is incident on the gap from the left side of the barrier. On , draw three successive crests of the wave after the wave has passed through the gap.
0625_m24_qp_42
THEORY
2024
Paper 4, Variant 2
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Questions Discovered
141