Wave Optics

Get insights from 88 questions on Wave Optics, answered by students, alumni, and experts. You may also ask and answer any question you like about Wave Optics

88
Questions
0
Discussions
0
Active Users
0
Followers

Have a question about Wave Optics? Ask our experts

Ask Your Question

Keep it short & simple. Type complete word. Avoid abusive language.

New answer posted•a year ago

Wave Optics Class 12th

In a Young’s double slit experiment, a laser light of 560 nm produces an interference pattern with consecutive bright fringes’ separation of 7.2 mm. Now another light is used to produce an interference pattern with consecutive bright fringes’ separation of 8.1 mm. The wavelength of second light is__________nm.

4 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

$λ_{1} = 560 n m,$ fringe width, B = 7.2 mm

$\Rightarrow B_{1} = \frac{D λ_{1}}{d} = 7.2 m m$

For $λ_{2} \to B_{2} = \frac{D λ_{2}}{d} = 8.1 m m$ $_{}_{} \frac{_{}}{}$

$\frac{B_{2}}{B_{1}} = \frac{λ_{2}}{λ_{1}} = \frac{8.1}{7.2} \Rightarrow λ_{2} \frac{81}{72} λ_{1}$

$= \frac{9}{8} \times 560 n m$

= 630 nm

Upvote

New answer posted•a year ago

Wave Optics Physics NCERT Exemplar Solutions Class 12th Chapter Ten

In Young’s double slit experiment, the fringe width is 12mm. If the entire arrangement is placed in water refractive index $\frac{4}{3}$ , then the fringe width becomes (in mm):

4 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

$β = 12 m m = 12 \times 1 0^{- 3} m$

$\begin{array}{l} β' = \frac{β}{μ} = \frac{12 \times 1 0^{- 3}}{4 / 3} = 9 \times 1 0^{- 3} m \\ β' = 9 m m \end{array}$

Upvote

New answer posted•a year ago

Wave Optics Physics NCERT Exemplar Solutions Class 12th Chapter Ten

A beam of plane polarized light of large cross-sectional area and uniform intensity of $3.3 {W m}^{- 2}$ falls normally on a polarizer (cross sectional area $3 \times 10^{- 4} m^{2}$ ) which rotates about its axis with an angular speed of $31.4 r a d / s$ . The energy of light passing through the polariser per revolution, is close to:

5 Views|Posted a year ago

Asked by Alok Kumar Singh

Answered by

Alok Kumar Singh | Contributor-Level 10

a year ago

$E = (I) (t) (A) ?{c o s}^{2} ? θ?$
$\Rightarrow (3.3) [\frac{2 π}{31.4}] [3 \times 10^{- 4}] \times \frac{1}{2}$

$\Rightarrow 0.99 \times 10^{- 4}$

Upvote

New answer posted•a year ago

Wave Optics Physics NCERT Exemplar Solutions Class 12th Chapter Ten

Choose the correct option relating wavelengths of different parts of electromagnetic wave spectrum:

3 Views|Posted a year ago

Asked by Alok Kumar Singh

Answered by

Alok Kumar Singh | Contributor-Level 10

a year ago

Kindly go through the solution

Upvote

New answer posted•a year ago

Wave Optics Physics NCERT Exemplar Solutions Class 12th Chapter Ten

Orange light of wavelength $6000 \times 10^{- 10} m$ illuminates a single slit of width $0.6 \times 10^{- 4} m$ . the maximum possible number of diffraction minima produced on both sides of the central maximum is

14 Views|Posted a year ago

Asked by Alok Kumar Singh

Answered by

Alok Kumar Singh | Contributor-Level 10

a year ago

Sol. Angular momentum conservation:

$\begin{array}{r} \Rightarrow I_{1} ω_{1} + I_{2} ω_{2} = (I_{1} + I_{2}) ω_{f} \\ \Rightarrow \frac{{M R}^{2}}{2} ω_{o} = (\frac{{M R}^{2}}{2} + \frac{{M R}^{2}}{8}) ω_{f} \\ \Rightarrow ω_{f} = \frac{4}{5} ω_{o} \\ \Rightarrow {K E}_{final} = \frac{1}{2} (I_{1} + I_{2}) ω_{f}^{2} = \frac{{M R}^{2} ω^{2}}{5} \\ \Rightarrow K E_{initial} = \frac{1}{2} I, ω_{0}^{2} = \frac{{M R}^{2} ω^{2}}{4} \\ \Rightarrow % loss \Rightarrow 20 % . \end{array}$

Upvote

New answer posted•a year ago

Wave Optics Physics NCERT Exemplar Solutions Class 12th Chapter Ten

If a wave gets refracted into a denser medium, then which of the following is true?

2 Views|Posted a year ago

Asked by Payal Gupta

Answered by

Payal Gupta | Contributor-Level 10

a year ago

$μ_{2} > μ_{1}$

$\frac{μ_{2}}{μ_{1}} > 1$

$μ_{2} = \frac{c}{v_{2}}, μ_{1} = \frac{c}{v_{1}}$

$\frac{μ_{2}}{μ_{1}} = \frac{v_{1}}{v_{2}} > 1 \Rightarrow v_{1} > v_{2}$

Frequency remains constant while refraction since energy is constant

$υ = \frac{v}{λ}$ &n

Upvote

New question posted•a year ago

Wave Optics Class 12th

<p><strong>If a wave gets refracted into a denser medium, then which of the following is true?</strong></p>

2 Views|Posted a year ago

Asked by Payal Gupta

New answer posted•a year ago

Wave Optics Physics NCERT Exemplar Solutions Class 12th Chapter Ten

For light diverging from a point source,
(a) The wavefront is spherical
(b) The intensity decreases in proportion to the distance squared
(c) The wavefront is parabolic
(d) The intensity at the wavefront does not depend on the distance

9 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Answer- (a, b)

Explanation- Due to the point source light propagates in all directions symmetrically and hence, wavefront will be spherical as shown in the diagram.