The image contains four physics problems related to optics and diffraction:a) Two narrow slits 80 μm apart are illuminated with light of wavelength 620 nm. What is the angle of the first fringe in radians? In degrees?b) Light from a sodium lamp illuminates two narrow slits with light wavelength of 589 nm. The fringe spacing on a screen 150 cm behind the slits is 4.0 mm. What is the spacing (in mm) between the two slits?c) A diffraction grating has 750 lines, or slits, every millimeter. What is the spacing between any neighboring two slits?d) The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm (red) and 486 nm (blue). Light from a hydrogen lamp illuminates a diffraction grating with 500 lines/mm, and the light is observed on a screen 1.50 m behind the grating. What is the distance between the first-order red and blue fringes?

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Answered: a) Two narrow slits 80 μm apart are…

a) Two narrow slits 80 μm apart are illuminated with light of wavelength 620 nm. What is the angle of the first fringe in radians? In degrees?

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Question

The image contains four physics problems related to optics and diffraction:

a) Two narrow slits 80 μm apart are illuminated with light of wavelength 620 nm. What is the angle of the first fringe in radians? In degrees?

b) Light from a sodium lamp illuminates two narrow slits with light wavelength of 589 nm. The fringe spacing on a screen 150 cm behind the slits is 4.0 mm. What is the spacing (in mm) between the two slits?

c) A diffraction grating has 750 lines, or slits, every millimeter. What is the spacing between any neighboring two slits?

d) The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm (red) and 486 nm (blue). Light from a hydrogen lamp illuminates a diffraction grating with 500 lines/mm, and the light is observed on a screen 1.50 m behind the grating. What is the distance between the first-order red and blue fringes?

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Answer for B only
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