Start Free Mock LoginAlready registered? Login here

Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsDiffractionEasy2 minPYQ_2020

PhysicsEasysingle choice

In a Fraunhoffer diffraction experiment at a single slit using light of wavelength $400 nm$ , the first minimum is formed at an angle of $30 °$ . Then the direction $θ$ of the first secondary maximum is

Options:

Answer:

Solution:

For first minimum,

$\sin 30^{o} = \frac{λ}{a}$

$\frac{1}{2} = \frac{λ}{a}$

$a = 2 λ$

Now, For 1st secondary maxima

$\sin θ = \frac{3 λ}{2 a}$

$\sin θ = \frac{3 λ}{2 \times 2 λ}$

$\sin θ = \frac{3}{4}$

$θ = \sin^{- 1} (\frac{3}{4})$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Wave OpticsSubtopic:Diffraction

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...