the speed of red and blue colour lights are equal in medium A.,but different in meduim B . mediums A and B can be>>
1>> air and glan
2>> glan and air
3>>glan and water
4>>water and glass
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option third is the correct one
glan and water
glan and water
Yashddsy26:
1 is correct
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no.1 is correct....in air speed of both is equal bit changes in glan
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