O-LevelPhysicsNuclear Physics5054/22 · Oct/Nov 2019 · Q35 Marks
Solar panels are used to heat water.
- (a)(i)The energy absorbed by solar panels comes from the Sun. Describe how this energy is produced inside the Sun.[2]
- (a)(ii)State how this energy is transferred to Earth.[1]
- (b)Explain why solar panels are usually black.[2]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2019). The mark or mark type is shown in brackets.
- [B1] (nuclear) fusion (reactions) or nuclei fuse
- [B1] small nuclei / hydrogen nuclei joining together (and release energy) or larger nucleus produced
- [B1] infra-red (radiation) or ultraviolet (radiation) or (visible) light
- [M1] black surfaces are (good) absorbers
- [A1] of (infra-red) radiation / heat / (visible) light / thermal energy
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