Wave Optics Test

Result

Wave Optics Test - 44

Score
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Weekly Quiz Competition

Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

When an unpolarized light of intensity I₀ is incident on a polarizing sheet, the intensity of the light which does not get transmitted is

A
Zero

B

C

D
Question 3
4 / -1

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

A
Reflected beams is polarised 100 percent

B
Reflected and refracted beams are partially polarized

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

D
All of the above
Question 4
4 / -1

An optically active compound

A
Rotates the plane polarised light

B
Changes the direction of polarised light

C
Does not allow plane polarised light to pass through

D
None of the above
Question 5
4 / -1

The Brewster angle for the glass-air interface is 54.74°. If a ray of light going from air to glass strikes at an angle of incidence 45°, then the angle of refraction is
(Hint : tan 54.74° = √2)

A
60°

B
30°

C
25°

D
54.74°

Solution
Question 6
4 / -1

A beam of natural light falls on a system of 5 polaroids, which are arranged in succession such that the pass axis of each polaroid is turned through 60° with respect to the preceding one. The fraction of the incident light intensity that passes through the system is

A

B

C

D

Solution
Question 7
4 / -1

A plane electromagnetic wave travelling along the X-direction has a wavelength of 3 mm. The variation in the electric field occurs in the Y-direction with an amplitude 66 Vm^–1. The equations for the electric and magnetic field as a function of x and t respectively

A

B

C

D

Solution
Question 8
4 / -1

Pick out the longest wavelength from the following types of radiations

A
Blue light

B
γ-rays

C
X-rays

D
Red light

Solution
Question 9
4 / -1

Wave which cannot travel in vacuum is

A
X-rays

B
Infrasonic

C
Ultraviolet

D
Radiowaves
Question 10
4 / -1

Which of the following represents an infrared wavelength?

A
10^–4 cm

B
10^–5 cm

C
10^–6 cm

D
10^–7 cm