A given individual is unable to see objects clearly when he is beyond 110 cm. Wh

Question

A given individual is unable to see objects clearly when he is beyond 110 cm. What power lens should be used to correct this problem? A) -0413 D B) -9.61165 D C) -8.627451 D D) -2.024 D E) -0.9091 Diopters A multiple slit diffraction grating has a slit separation of 4 times 10-6 m. Find the wavelength of the monochromatic light that will have its 3 order bright fringe diffracted through an angle of 39 degree. (1 nm = 10^-9 m) A) 1.95 times 10^-6 B) 0.8391 times 10^-6 C) 0.308 times 10^-6 D) 3.588 times 10^-6 E) 3.6 times 10^-6

Explanation / Answer

Given:

Far point = 110 cm

We know, f = - Far point = -110cm = -1.10 m

So, power = 1/f = 1/(-1.10) = -0.9091 Diopters (ans) ->option (E)

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