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Standard XII

Physics

Single Slit Diffraction

Monochromatic...

Question

Monochromatic light of wavelength $4500$ $o A$ falls on slit of width 'a'. In diffraction pattern second maxima deviates through $30^{o}$ . The slit width is ________.

900 o A

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18000 o A

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13500 o A

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22500 o A

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Solution

The correct option is B $18000 o A$
$a sin θ = n λ \Rightarrow a sin 30^{0} = 2 λ a = \frac{2 \times 4500 ˚ A}{1 / 2} = 18000 ˚ A$

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Monochromatic light of wavelength 4500 oA falls on slit of width 'a'. In diffraction pattern second maxima deviates through 30o. The slit width is ________.

The correct option is B 18000oAasinθ=nλ⇒asin300=2λa=2×4500˚A1/2=18000˚A

Monochromatic light of wavelength $4500$ $o A$ falls on slit of width 'a'. In diffraction pattern second maxima deviates through $30^{o}$ . The slit width is ________.

The correct option is B $18000 o A$
$a sin θ = n λ \Rightarrow a sin 30^{0} = 2 λ a = \frac{2 \times 4500 ˚ A}{1 / 2} = 18000 ˚ A$