Physics Chapter Physical Optics Mcqs

#1
The phenomenon of bending of light around the edges of an obstacle is called:

A) Reflection

B) Refraction

C) Diffraction

D) Interference

Answer: C

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#2
In Young's double-slit experiment, the condition for constructive interference is:

A) \( d \sin\theta = m\lambda \)

B) \( d \sin\theta = (m + \frac{1}{2})\lambda \)

C) \( d \sin\theta = 0 \)

D) \( d \sin\theta = \frac{\lambda}{2} \)

Answer: A

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#3
Which property of light is conclusively proven by the phenomenon of interference?

A) Particle nature

B) Wave nature

C) Ray nature

D) Quantum nature

Answer: B

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#4
In a single-slit diffraction pattern, the central maximum is:

A) Twice as wide as other maxima

B) The same width as other maxima

C) Much wider than other maxima

D) Narrower than other maxima

Answer: C

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#5
The formula for the spacing between adjacent fringes in Young's experiment is \( \beta = \frac{\lambda L}{d} \). If the distance to the screen (L) is doubled, the fringe spacing will:

A) Halve

B) Double

C) Remain the same

D) Quadruple

Answer: B

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#6
Two sources of light are said to be coherent if they emit light waves of:

A) The same frequency and a constant phase difference

B) The same frequency only

C) The same amplitude

D) The same wavelength only

Answer: A

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#7
Which of the following cannot be polarized?

A) Radio waves

B) Sound waves

C) Microwaves

D) Light waves

Answer: B

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#8
Malus' law describes the intensity of polarized light after passing through an analyzer. It is given by:

A) \( I = I_0 \cos\theta \)

B) \( I = I_0 \cos^2\theta \)

C) \( I = I_0 \sin\theta \)

D) \( I = I_0 \sin^2\theta \)

Answer: B

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Physics

#1 The phenomenon of bending of light around the edges of an obstacle is called:

A) Reflection B) Refraction C) Diffraction D) Interference

Comments:

#2 In Young's double-slit experiment, the condition for constructive interference is:

A) \( d \sin\theta = m\lambda \) B) \( d \sin\theta = (m + \frac{1}{2})\lambda \) C) \( d \sin\theta = 0 \) D) \( d \sin\theta = \frac{\lambda}{2} \)

Comments:

#3 Which property of light is conclusively proven by the phenomenon of interference?

A) Particle nature B) Wave nature C) Ray nature D) Quantum nature

Comments:

#4 In a single-slit diffraction pattern, the central maximum is:

A) Twice as wide as other maxima B) The same width as other maxima C) Much wider than other maxima D) Narrower than other maxima

Comments:

#5 The formula for the spacing between adjacent fringes in Young's experiment is \( \beta = \frac{\lambda L}{d} \). If the distance to the screen (L) is doubled, the fringe spacing will:

A) Halve B) Double C) Remain the same D) Quadruple

Comments:

#6 Two sources of light are said to be coherent if they emit light waves of:

A) The same frequency and a constant phase difference B) The same frequency only C) The same amplitude D) The same wavelength only

Comments:

#7 Which of the following cannot be polarized?

A) Radio waves B) Sound waves C) Microwaves D) Light waves

Comments:

#8 Malus' law describes the intensity of polarized light after passing through an analyzer. It is given by:

A) \( I = I_0 \cos\theta \) B) \( I = I_0 \cos^2\theta \) C) \( I = I_0 \sin\theta \) D) \( I = I_0 \sin^2\theta \)

Comments:

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#1
The phenomenon of bending of light around the edges of an obstacle is called:

A) Reflection

B) Refraction

C) Diffraction

D) Interference

#2
In Young's double-slit experiment, the condition for constructive interference is:

A) \( d \sin\theta = m\lambda \)

B) \( d \sin\theta = (m + \frac{1}{2})\lambda \)

C) \( d \sin\theta = 0 \)

D) \( d \sin\theta = \frac{\lambda}{2} \)

#3
Which property of light is conclusively proven by the phenomenon of interference?

A) Particle nature

B) Wave nature

C) Ray nature

D) Quantum nature

#4
In a single-slit diffraction pattern, the central maximum is:

A) Twice as wide as other maxima

B) The same width as other maxima

C) Much wider than other maxima

D) Narrower than other maxima

#5
The formula for the spacing between adjacent fringes in Young's experiment is \( \beta = \frac{\lambda L}{d} \). If the distance to the screen (L) is doubled, the fringe spacing will:

A) Halve

B) Double

C) Remain the same

D) Quadruple

#6
Two sources of light are said to be coherent if they emit light waves of:

A) The same frequency and a constant phase difference

B) The same frequency only

C) The same amplitude

D) The same wavelength only

#7
Which of the following cannot be polarized?

A) Radio waves

B) Sound waves

C) Microwaves

D) Light waves

#8
Malus' law describes the intensity of polarized light after passing through an analyzer. It is given by:

A) \( I = I_0 \cos\theta \)

B) \( I = I_0 \cos^2\theta \)

C) \( I = I_0 \sin\theta \)

D) \( I = I_0 \sin^2\theta \)