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Doppler effect

2 PYQ across 2 exams · 1990–2020 — the complete chronological timeline of how UPSC has tested this idea, oldest to newest.

CSE 1990 → CAPF 2020
19901 PYQ
CSEQ7
The evidence for the rotation of stars comes mainly from the…
20201 PYQ
CAPFQ5
The radar used by police to check over-speeding vehicles works on the principle of…
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