Physics Chapter Physical Optics Mcqs

#89
The condition for destructive interference is that the path difference should be

A) n?

B) (n+1/2)?

C) ?/2

D) ?/4

Answer: B

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#90
In Young’s double slit experiment, the fringe width is given by

A) \( \beta= \frac{\lambda D}{d} \)

B) \( \beta= \frac{\lambda d}{D} \)

C) \( \beta= D \lambda / d \)

D) \( \beta= d \lambda / D \)

Answer: D

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#91
In Young’s double slit experiment, if the distance between the slits is doubled, the fringe width becomes

A) Half

B) Double

C) One-fourth

D) Four times

Answer: A

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#92
In Young’s double slit experiment, if the distance from the slits to the screen is doubled, the fringe width becomes

A) Half

B) Double

C) One-fourth

D) Four times

Answer: A

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#93
In Young’s double slit experiment, if the wavelength is doubled, the fringe width becomes

A) Half

B) Double

C) One-fourth

D) Four times

Answer: B

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#94
The phenomenon of diffraction is based on

A) Particle nature of light

B) Wave nature of light

C) Both particle and wave nature

D) Neither particle nor wave nature

Answer: B

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#95
The diffraction pattern of a single slit consists of

A) A central bright fringe

B) A central dark fringe

C) Equally spaced bright and dark fringes

D) No fringes

Answer: A

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#96
The width of the central maximum in a single slit diffraction pattern is

A) Inversely proportional to the slit width

B) Directly proportional to the slit width

C) Independent of the slit width

D) Proportional to the square of the slit width

Answer: A

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Physics

#89 The condition for destructive interference is that the path difference should be

A) n? B) (n+1/2)? C) ?/2 D) ?/4

Comments:

#90 In Young’s double slit experiment, the fringe width is given by

A) \( \beta= \frac{\lambda D}{d} \) B) \( \beta= \frac{\lambda d}{D} \) C) \( \beta= D \lambda / d \) D) \( \beta= d \lambda / D \)

Comments:

#91 In Young’s double slit experiment, if the distance between the slits is doubled, the fringe width becomes

A) Half B) Double C) One-fourth D) Four times

Comments:

#92 In Young’s double slit experiment, if the distance from the slits to the screen is doubled, the fringe width becomes

A) Half B) Double C) One-fourth D) Four times

Comments:

#93 In Young’s double slit experiment, if the wavelength is doubled, the fringe width becomes

A) Half B) Double C) One-fourth D) Four times

Comments:

#94 The phenomenon of diffraction is based on

A) Particle nature of light B) Wave nature of light C) Both particle and wave nature D) Neither particle nor wave nature

Comments:

#95 The diffraction pattern of a single slit consists of

A) A central bright fringe B) A central dark fringe C) Equally spaced bright and dark fringes D) No fringes

Comments:

#96 The width of the central maximum in a single slit diffraction pattern is

A) Inversely proportional to the slit width B) Directly proportional to the slit width C) Independent of the slit width D) Proportional to the square of the slit width

Comments:

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#89
The condition for destructive interference is that the path difference should be

A) n?

B) (n+1/2)?

C) ?/2

D) ?/4

#90
In Young’s double slit experiment, the fringe width is given by

A) \( \beta= \frac{\lambda D}{d} \)

B) \( \beta= \frac{\lambda d}{D} \)

C) \( \beta= D \lambda / d \)

D) \( \beta= d \lambda / D \)

#91
In Young’s double slit experiment, if the distance between the slits is doubled, the fringe width becomes

A) Half

B) Double

C) One-fourth

D) Four times

#92
In Young’s double slit experiment, if the distance from the slits to the screen is doubled, the fringe width becomes

A) Half

B) Double

C) One-fourth

D) Four times

#93
In Young’s double slit experiment, if the wavelength is doubled, the fringe width becomes

A) Half

B) Double

C) One-fourth

D) Four times

#94
The phenomenon of diffraction is based on

A) Particle nature of light

B) Wave nature of light

C) Both particle and wave nature

D) Neither particle nor wave nature

#95
The diffraction pattern of a single slit consists of

A) A central bright fringe

B) A central dark fringe

C) Equally spaced bright and dark fringes

D) No fringes

#96
The width of the central maximum in a single slit diffraction pattern is

A) Inversely proportional to the slit width

B) Directly proportional to the slit width

C) Independent of the slit width

D) Proportional to the square of the slit width