Physics And Measurement Question 284

Question: The refractive index of water measured by the relation μ=realdepthapparentdepth is found to have values of 1.34,1.38,1.32 and 1.36; the mean value of refractive index with percentage error is

Options:

A) 1.35±1.48

B) 1.35±0

C) 1.36±6

D) 1.36±0

Show Answer

Answer:

Correct Answer: A

Solution:

[a] The mean value of refractive index, μ=1.34+1.38+1.32+1.3641.35

and Δμ=|(1.351.34)|+|(1.351.38)|+|(1.351.32)|+|(1.351.36)|4

=0.02

Thus Δμμ×100=0.021.35×100=1.48



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