3 marksSome devices that each use one type of electromagnetic radiation are shown in Fig. 1.1.
Fig. 1.1
Draw one line from each device to the correct type of electromagnetic radiation. One has been done for you.
1 markFig. 1.2 shows a partially-labelled diagram of the electromagnetic spectrum.
Fig. 1.2
(i) On Fig. 1.2, add the names of the missing radiations at A and B.
[2]
(ii) Indicate the radiation that has the lowest frequency. On Fig. 1.2, draw a ring around the radiation.
[1]
3 marksAll electromagnetic waves share some properties.
Complete the sentences using the words from the list.
You may use each word once, more than once, or not at all
longitudinal transverse positively less dense medium same speed different speed vacuum dense medium |
All electromagnetic waves are ......................................
All electromagnetic waves can travel through a ......................................
All electromagnetic waves travel at the ...................................... in a vacuum
Electromagnetic (EM) waves carry energy and so can transfer energy from one point to another point.
Place a tick next to the examples of EM energy transfer.
Possible energy transfer examples | Place a tick if this is correct |
|---|---|
Water molecules absorb certain wavelengths of microwave radiation | |
All small objects such as electrons emit gamma radiation | |
Ultraviolet waves from the Sun provide plants with the energy for photosynthesis | |
Radio waves are absorbed by the buildings which they pass through | |
All hot objects emit infrared radiation |
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