Question

speed of light in glass is 2×10⁸ms¹ find the speed of light in air (aNg=3/2)​

Answer 1

Answer:

FIRST OF ALL,

WHAT IS SPEED?

==> SPEED IS THE RATIO OF DISTANCE PER UNIT TIME OR THE DISTANCE TRAVELLED BY THE BODY PER UNIT TIME.

NOW,

SPEED OF LIGHT IN AIR = 3 X 108 m/sec

SPEED OF LIGHT IN GLASS = 2 X 108 m/sec

AND,

SPEED OF LIGHT IN WATER = 225000 km/sec

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