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In a Young’s double slit experiment, the slits are placed 0.320 mm apart. Light of wavelength λ = 500 mm is incident on the slits.  The total number of bright fringes that are observed in the angular range −30° ≤ θ ≤ 30°  is

 


Question ID - 50107 :-

In a Young’s double slit experiment, the slits are placed 0.320 mm apart. Light of wavelength λ = 500 mm is incident on the slits.  The total number of bright fringes that are observed in the angular range −30° ≤ θ ≤ 30°  is

 

1 Answer
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Answer Key : (641) -

Pam difference

dsinθ = nλ

where d= separation of slits

λ = wave length

n= no. of maximas

0.32 × 10−3  sin 30 = n = 500 × 10−9

  N= 320

Hence total no. of maxmias observed in angular range −30°  ≤ θ ≤  30°   is

Maximas = 320 + 1 + 320 = 641



Next Question :

The height of an equilateral triangle is 10 cm. its area is

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