please help me for question number 121
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hello friend...!!
• option ' A ' is the correct answer
• According to the question we should calculator the time taken by the ray to cross the slab
• we know that,
T = d / V
here ' d ' denotes the thickness of slab and v denotes c/Φ where ' c ' is velocity of light and Φis the refractive index.
therefore,
T = ( 4 x 10^-2 x 3/2 ) / 3 x 10^8
therefore,
T = 6 x 10^-2 / 3 x 10^8
therefore,
T = 2 x 10^-10 sec
therefore option ' A ' is the correct answer
_____________________________
Hope it is useful...!!
• option ' A ' is the correct answer
• According to the question we should calculator the time taken by the ray to cross the slab
• we know that,
T = d / V
here ' d ' denotes the thickness of slab and v denotes c/Φ where ' c ' is velocity of light and Φis the refractive index.
therefore,
T = ( 4 x 10^-2 x 3/2 ) / 3 x 10^8
therefore,
T = 6 x 10^-2 / 3 x 10^8
therefore,
T = 2 x 10^-10 sec
therefore option ' A ' is the correct answer
_____________________________
Hope it is useful...!!
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