3.3. Electromagnetic spectrum
A subsection of Physics, 5054, through 3. Waves
Listing 10 of 41 questions
A large number of television sets in a shop are tuned to the same station. The signal travels to some of the sets via a satellite in orbit above the Earth. Explain why only electromagnetic waves are used to transmit the television signal. State the region of the electromagnetic spectrum used to transmit the television signal. Suggest why satellites are sometimes used to transmit television signals. The other television sets receive the signal directly from a ground-based transmitter very near to the shop. A salesman notices that the signal sent via the satellite arrives 0.24 s later than the signal sent directly to the other television sets. The speed of electromagnetic waves is 3.0 × 108 m / s. Calculate the distance travelled by the television signal in 0.24 s. distance =
5054_w10_qp_21
THEORY
2010
Paper 2, Variant 1
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Most of the energy emitted by the Sun is in three regions of the electromagnetic spectrum. The name of one of these three regions is the ultraviolet region. State the names of all three regions in order of increasing frequency. smallest frequency intermediate frequency largest frequency Some of the ultraviolet radiation emitted by the Sun reaches the surface of the Earth. Give one possible damaging effect of ultraviolet radiation on the human body and the property of ultraviolet radiation that causes this damage. damaging effect property Electromagnetic radiation is a transverse wave. Describe the difference between a transverse wave and a longitudinal wave.
5054_w23_qp_21
THEORY
2023
Paper 2, Variant 1
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Questions Discovered
41