Physics Chapter Physical Optics Mcqs

#17
In a diffraction grating experiment, which color of light is deviated the most?

A) Red

B) Yellow

C) Green

D) Violet

Answer: D

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#18
The formula for the position of the m-th minimum in a single-slit diffraction pattern is \( a \sin\theta = m\lambda \). For the first minimum, m is equal to:

A) 0

B) 0.5

C) 1

D) 2

Answer: C

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#19
X-ray diffraction is used to study the structure of crystals because the wavelength of X-rays is:

A) Much larger than the atomic spacing

B) Much smaller than the atomic spacing

C) Comparable to the atomic spacing

D) Zero

Answer: C

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#20
In Newton's rings experiment, the center of the pattern is dark when using reflected light because the phase change at the lower surface is:

A) 0°

B) 45°

C) 90°

D) 180°

Answer: D

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#21
The colors seen in a soap bubble are due to:

A) Dispersion

B) Interference

C) Scattering

D) Diffraction

Answer: B

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#22
If the angle between the axis of the analyzer and the polarizer is 90°, the intensity of transmitted light is:

A) Maximum

B) Minimum (zero)

C) Half of the maximum

D) One-fourth of the maximum

Answer: B

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#23
The resolving power of a grating is directly proportional to:

A) The wavelength of light used

B) The order of the spectrum

C) The number of rulings on the grating

D) Both B and C

Answer: D

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#24
In a Michelson interferometer, a bright fringe is observed when the path difference between the two beams is:

A) \( m\lambda \)

B) \( (m + \frac{1}{2})\lambda \)

C) \( \frac{\lambda}{2} \)

D) \( 2m\lambda \)

Answer: A

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Physics

#17 In a diffraction grating experiment, which color of light is deviated the most?

A) Red B) Yellow C) Green D) Violet

Comments:

#18 The formula for the position of the m-th minimum in a single-slit diffraction pattern is \( a \sin\theta = m\lambda \). For the first minimum, m is equal to:

A) 0 B) 0.5 C) 1 D) 2

Comments:

#19 X-ray diffraction is used to study the structure of crystals because the wavelength of X-rays is:

A) Much larger than the atomic spacing B) Much smaller than the atomic spacing C) Comparable to the atomic spacing D) Zero

Comments:

#20 In Newton's rings experiment, the center of the pattern is dark when using reflected light because the phase change at the lower surface is:

A) 0° B) 45° C) 90° D) 180°

Comments:

#21 The colors seen in a soap bubble are due to:

A) Dispersion B) Interference C) Scattering D) Diffraction

Comments:

#22 If the angle between the axis of the analyzer and the polarizer is 90°, the intensity of transmitted light is:

A) Maximum B) Minimum (zero) C) Half of the maximum D) One-fourth of the maximum

Comments:

#23 The resolving power of a grating is directly proportional to:

A) The wavelength of light used B) The order of the spectrum C) The number of rulings on the grating D) Both B and C

Comments:

#24 In a Michelson interferometer, a bright fringe is observed when the path difference between the two beams is:

A) \( m\lambda \) B) \( (m + \frac{1}{2})\lambda \) C) \( \frac{\lambda}{2} \) D) \( 2m\lambda \)

Comments:

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#17
In a diffraction grating experiment, which color of light is deviated the most?

A) Red

B) Yellow

C) Green

D) Violet

#18
The formula for the position of the m-th minimum in a single-slit diffraction pattern is \( a \sin\theta = m\lambda \). For the first minimum, m is equal to:

A) 0

B) 0.5

C) 1

D) 2

#19
X-ray diffraction is used to study the structure of crystals because the wavelength of X-rays is:

A) Much larger than the atomic spacing

B) Much smaller than the atomic spacing

C) Comparable to the atomic spacing

D) Zero

#20
In Newton's rings experiment, the center of the pattern is dark when using reflected light because the phase change at the lower surface is:

A) 0°

B) 45°

C) 90°

D) 180°

#21
The colors seen in a soap bubble are due to:

A) Dispersion

B) Interference

C) Scattering

D) Diffraction

#22
If the angle between the axis of the analyzer and the polarizer is 90°, the intensity of transmitted light is:

A) Maximum

B) Minimum (zero)

C) Half of the maximum

D) One-fourth of the maximum

#23
The resolving power of a grating is directly proportional to:

A) The wavelength of light used

B) The order of the spectrum

C) The number of rulings on the grating

D) Both B and C

#24
In a Michelson interferometer, a bright fringe is observed when the path difference between the two beams is:

A) \( m\lambda \)

B) \( (m + \frac{1}{2})\lambda \)

C) \( \frac{\lambda}{2} \)

D) \( 2m\lambda \)