02:39Apertures and Diffraction - Exploring Wave Motion (3/5)OpenLearn from The Open University210views
Multiple ChoiceA diffraction grating with 500 lines/mm is illuminated by two wavelengths of light: 450nm and 600nm. What is the distance between the m=2 bright fringes of the two colors of light on a screen 1.3m away?310views
Multiple ChoiceA diffraction grating has 500 lines/mm. If it is illuminated by a laser at 532nm, how many bright spots will be observed on a screen placed behind the grating?351views1comments
Multiple ChoiceA particular kind of oil with an index of refraction of 1.46 has spilled on water. The different thicknesses of the oil slick result in different colors being strongly reflected at different parts of the spill. But near the edges, you identify the thinnest part of the oil layer that strongly reflects green light with a wavelength of 550 nm when you are directly overhead. What is the thickness of the oil at this point? Assume light is incident normal to the oil surface.447views
Multiple ChoiceYou place one glass slide on top of another, with an animal hair between them at one end. You illuminate the slides with blue light of wavelength 450nm. You count along the slide and find 300 transitions from bright to dark and back to light. How thick is the hair?182views
Multiple ChoiceA carbon dioxide laser produces 10.6μm electromagnetic waves, which pass through a circular aperture with diameter 1.0mm. What is the approximate width of the laser beam when it strikes a target 3.0m away?177views
Multiple ChoiceA 480nm light is used to illuminate a diffraction grating with 500lines/mm. What is the angle, measured from the central maximum, to the m=3 bright fringe?308views
Textbook Questionb. Use your expression from part a to find an expression for the separation Δy on the screen of two fringes that differ in wavelength by Δλ.60viewsHas a video solution.
Textbook QuestionFIGURE EX33.17 shows the interference pattern on a screen 1.0 m behind an 800 lines/mm diffraction grating. What is the wavelength (in nm) of the light?155viewsHas a video solution.
Textbook QuestionIf the planes of a crystal are 3.50 Å (1 Å = 10-10 m = 1 Ångstrom unit) apart, (a) what wavelength of electromagnetic waves is needed so that the first strong interference maximum in the Bragg reflection occurs when the waves strike the planes at an angle of 22.0°, and in what part of the electromagnetic spectrum do these waves lie?138viewsHas a video solution.
Textbook QuestionTwo satellites at an altitude of 1200 km are separated by 28 km. If they broadcast 3.6-cm microwaves, what minimum receiving-dish diameter is needed to resolve (by Rayleigh’s criterion) the two transmissions?20viewsHas a video solution.
Textbook QuestionA Michelson interferometer uses red light with a wavelength of 656.45 nm from a hydrogen discharge lamp. How many bright-dark-bright fringe shifts are observed if mirror M₂ is moved exactly 1 cm?24viewsHas a video solution.