Wave Optics Test

Result

Wave Optics Test - 22

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Weekly Quiz Competition

Question 1
4 / -1

H-polaroid is prepared by

A
orienting herapathite crystal in the same direction in nitrocellulose

B
using thin tourmaline crystals

C
stretching polyvinyl alcohol and then heated with dehydrating agent

D
stretching polyvinyl alcohol and then impregnating with iodine
Question 2
4 / -1

When unpolarised light beam is incident from air onto glass (n =1.5) at the polarising angle

A
reflecttd beam is polarised 100 percent

B
reflected and refracted beams are partially polarised

C
the reason for (a) is that almost all the light is reflected

D
All of the above
Question 3
4 / -1

The correct curve between the energy of photon (E) and its wavelength (λ) in Fig. is

A

B

C

D

Solution
Question 4
4 / -1

In Young’s expt, the distance between two slits is d/3 and the distance between the screen and the slits is 3 D. The number of fringes in 1/3m on the screen, formed by monochromatic light of wavelength 3 λ, will be

A

B

C

D

Solution
Question 5
4 / -1

In the set up shown in Fig the two slits, S₁ and S₂ are not equidistant from the slit S. The central frings at o is then

A
always bright

B
always dark

C
either dark or bright depending on the position of S

D
neither dark nor bright
Question 6
4 / -1

In Young’s double slit experiment, the two equally bright slits are coherent, but of phase difference π/3. If maximum intensity on the screen is I₀, the intensity at the point on the screen equidistant from the slit is

A
I₀

B
I₀/2

C
I₀/4

D
3I₀/4

Solution
Question 7
4 / -1

In an interference pattern produced by two identical slits, the intensity at the site of the central maximum is I. The intensity at the same spot when either of the two slits is closed is I₀.Therefore

A
I = I₀

B
I = 2I₀

C
I = 4I₀

D
I and I₀ are not related to each other
Question 8
4 / -1

Interference fringes are being produced on screen XY by the slits S₁ and S₂. In fig the correct fringe locus is

A
PQ

B
W₁ W₂

C
W₃ W₄

D
XY
Question 9
4 / -1

In Young’s double slit experiment let S₁ and S₂ be the two slits, and C be the centre of the screen. If ∠S₁CS₂ = θ and λ is the wavelength, the fringe width will be

A

B

C

D

Solution
Question 10
4 / -1

Light of wavelength λ in air enters a medium of refractive index μ. Two points in this medium, lying along the path of this light are at a distance x apart. The phase difference between these points is

A

B

C

D

Solution