Diffraction

Q. For a diffraction grating with 500 lines per mm, what is the angle of the first order maximum for light of wavelength 600 nm?
  • A. 30 degrees
  • B. 45 degrees
  • C. 60 degrees
  • D. 15 degrees
Q. For a diffraction pattern produced by a single slit, how does the width of the central maximum change if the slit width is halved?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. For a single slit of width 'a', what is the angular position of the first minimum?
  • A. λ/a
  • B. a/λ
  • C. sin θ = λ/a
  • D. tan θ = λ/a
Q. If a light wave passes through a narrow slit and produces a diffraction pattern, what happens to the intensity of the central maximum compared to the other maxima?
  • A. It is the same
  • B. It is greater
  • C. It is lesser
  • D. It is zero
Q. If light of wavelength 500 nm passes through a diffraction grating with 1000 lines/mm, what is the angle for the first-order maximum?
  • A. 30 degrees
  • B. 60 degrees
  • C. 45 degrees
  • D. 15 degrees
Q. If the distance between the slits in a double-slit experiment is increased, what happens to the interference pattern?
  • A. Fringe width increases
  • B. Fringe width decreases
  • C. Fringe intensity increases
  • D. Fringe intensity decreases
Q. If the slit width is equal to the wavelength of light used, what is the expected diffraction pattern?
  • A. No diffraction
  • B. Single maximum
  • C. Wide central maximum
  • D. Narrow central maximum
Q. If the slit width is halved in a single-slit diffraction experiment, what happens to the width of the central maximum?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the wavelength of light used in a diffraction experiment is halved, what happens to the position of the first diffraction minimum?
  • A. It moves closer to the center
  • B. It moves further from the center
  • C. It remains unchanged
  • D. It disappears
Q. If the wavelength of light used in a diffraction experiment is halved, what happens to the position of the minima?
  • A. They move closer together
  • B. They move further apart
  • C. They remain unchanged
  • D. They disappear
Q. If the wavelength of light used in a diffraction experiment is halved, what happens to the angular position of the first minimum in a single-slit diffraction pattern?
  • A. It remains the same
  • B. It doubles
  • C. It halves
  • D. It quadruples
Q. If the wavelength of light used in a diffraction experiment is increased, what happens to the diffraction pattern?
  • A. It becomes sharper
  • B. It becomes broader
  • C. It remains unchanged
  • D. It disappears
Q. In a diffraction grating, if the number of slits is increased, what happens to the sharpness of the maxima?
  • A. Sharpness increases
  • B. Sharpness decreases
  • C. No effect
  • D. Maxima disappear
Q. In a diffraction grating, what is the relationship between the angle of diffraction and the order of the maximum?
  • A. Directly proportional
  • B. Inversely proportional
  • C. Independent
  • D. Exponential
Q. In a diffraction pattern, how does the intensity of the maxima compare to the minima?
  • A. Maxima are always brighter than minima
  • B. Minima have the same intensity as maxima
  • C. Minima are always darker than maxima
  • D. Intensity is uniform throughout
Q. In a diffraction pattern, if the first minimum occurs at an angle of 30°, what is the ratio of the slit width to the wavelength?
  • A. 1:2
  • B. 1:√3
  • C. √3:1
  • D. 2:1
Q. In a diffraction pattern, the intensity of the central maximum is how many times that of the first minimum?
  • A. Zero
  • B. One
  • C. Infinity
  • D. Two
Q. In a diffraction pattern, what does the intensity of the central maximum depend on?
  • A. Wavelength only
  • B. Slit width only
  • C. Both wavelength and slit width
  • D. Distance from the slit
Q. In a diffraction pattern, what does the term 'fringe separation' refer to?
  • A. Distance between two minima
  • B. Distance between two maxima
  • C. Distance between a maximum and a minimum
  • D. None of the above
Q. In a diffraction pattern, what does the term 'order of diffraction' refer to?
  • A. The number of slits used
  • B. The number of maxima observed
  • C. The wavelength of light used
  • D. The distance to the screen
Q. In a diffraction pattern, what is the ratio of the intensity of the central maximum to that of the first minimum?
  • A. 1:0
  • B. 1:1
  • C. 1:2
  • D. 1:4
Q. In a double-slit experiment, if the distance between the slits is doubled, what happens to the fringe separation on the screen?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. In a double-slit experiment, if the distance between the slits is halved, what happens to the fringe separation on the screen?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. In a double-slit experiment, if the wavelength of light is increased, what happens to the distance between the fringes?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. In a double-slit experiment, what is the effect of increasing the distance between the slits on the fringe width?
  • A. Fringe width increases
  • B. Fringe width decreases
  • C. Fringe width remains constant
  • D. Fringe width becomes zero
Q. In a single-slit diffraction experiment, what happens to the width of the central maximum as the slit width decreases?
  • A. It increases
  • B. It decreases
  • C. It remains the same
  • D. It becomes zero
Q. In a single-slit diffraction pattern, how does the intensity of the central maximum compare to the first minimum?
  • A. Equal
  • B. Twice
  • C. Four times
  • D. Half
Q. In a single-slit diffraction pattern, how does the intensity of the first minimum compare to the intensity of the central maximum?
  • A. It is equal
  • B. It is half
  • C. It is zero
  • D. It is one-fourth
Q. In a single-slit diffraction pattern, the width of the central maximum is 4 mm. If the slit width is halved, what will be the new width of the central maximum?
  • A. 2 mm
  • B. 4 mm
  • C. 8 mm
  • D. 16 mm
Q. In double-slit diffraction, what is the effect of increasing the distance between the slits on the fringe width?
  • A. Fringe width increases
  • B. Fringe width decreases
  • C. Fringe width remains constant
  • D. Fringe width becomes zero
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