A postage stamp kept below a rectangular glass block of refractive index 1.5 when viewed from vertically above it, appears to be raised by 7.0mm. Calculate the thickness of the glass block. Please answer it quickly......
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Answered by
93
Answer is in the pic
Hope this helps...
Hope this helps...
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kris9845:
is it real depth and apparent depth formula ???
yeah
real depth / apparent depth
yes
it can be used anywhere where is refractive medium
Shift
??? formula
yes
btw u r in which class?
10th
Answered by
21
Answer:Refractive index = real / apparent depth Let real depth be ( x ) therefore apparent depth will be ( x - 7mm) given refractive index is 1.5 therefore >1.5 = x/ (x-7mm) >1.5x - 10.5 =x. ie 1.5(x - 7mm) >1.5x - x = 10.5 > 0.5x = 10.5 > x = 10.5/ 0.5 = 2.1 therefore answer is 2.1 cm
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