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Grade 12th passWave Optics

Monochromatic green light , wavelength =554nm, illustrates two parallel, narrow slits 7.7micrometer apart. Calculate the angular position of the third- order (m=3) bright fringe (a)in radians and (b)in degrees.

Salman khan

8 Years agoGrade 12th pass

1 Answer

Arun

8 Years ago

d = 7.7 x 10 -6 m, m=3, λ= 554 nm = 554 x10-9 m

θ = ? in radians and in degrees.

Use: for the bright fringe: d sinθ = mλ (put m=3):

Answers:
(a)θ=0.216 radians
(b) θ =12.5 degrees

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