The Student Room Group

edexcel IGCSE physics

non-regional btw
- what was the tick the box energy transfer one about stars?
- what was the current one with 3 switches? 39 or 82
- was light ray B in the 6 marker TIR or not?
-39
-no
Reply 2
Original post by frazzle77
non-regional btw
- what was the tick the box energy transfer one about stars?
- what was the current one with 3 switches? 39 or 82
- was light ray B in the 6 marker TIR or not?


I got 82 and not TIR
Reply 3
Original post by frazzle77
non-regional btw
- what was the tick the box energy transfer one about stars?
- what was the current one with 3 switches? 39 or 82
- was light ray B in the 6 marker TIR or not?


39 and it wasn’t totally internally reflected bc tir can only happen if a ray moves from a more dense medium to less dense medium, in the question the ray was going from less dense to a more dense medium
Reply 4
Original post by frazzle77
non-regional btw
- what was the tick the box energy transfer one about stars?
- what was the current one with 3 switches? 39 or 82
- was light ray B in the 6 marker TIR or not?
the current is the debate of the whole exam, some people think it was 39 but others think its 82, i personally think its 39

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