3. For this question, assume an experimental apparatus setup that is designed to do an experiment in the same manner as
Posted: Fri May 06, 2022 6:47 am
3. For this question, assume an experimental apparatus setup that is designed to do an experiment in the same manner as Young's double-slit experiment. We will use a monochromatic neon lamp light source of 670.5 nm.
(a) What colour is the neon light? Would we be able to see such light if its wavelength was doubled? halved?
(b) What is the frequency of the neon light described above? [ Assume v=c for light ('in vacuum', but also a good approximation for in-air too). Also, see above in the first of Q#2's two 'end-notes'. ] Would we be able to see such light if its frequency was doubled? halved?
(c) Are there any kinds of specialized vision-spectrum range-enhancing 'gear' that we could use to help us see any of the light we might not be able to see in the several different alternate cases described in parts (a) and (b) above? Look up and state one example each for this kind of gear for 'just beyond' each end of the visible-to-humans spectrum of electromagnetic wavelengths.
(d) Is(Are) there any animal(s)(note that snakes and other reptiles, as well as insects and spiders (etc...) are all also considered to be "animals") that can see, unaided, the(those) part(parts) of the spectrum that we might not be able to see in the several different alternate cases described in parts (a) and (b) above? Look up and state one example each for a specific animal that can see 'just beyond' the visible spectrum of electromagnetic wavelengths, one specific different animal for beyond each of the opposite ends of the visible-to-humans light spectrum.
(e) If the two slits of the experimental gear are 8.25 μm apart, what are the angles to the midline for each of the 1st and 2nd nodal lines that would lead to the 1st and 2nd dark bands on a viewing screen placed 'downstream' of the 2-slit barrier?
(f) What is the maximum number of dark bands possible given the original neon lamp's monochromatic wavelength and the distance between slits as given in part (e) above?
(g) If at least 5 dark bands were possible, what would be the total distance between the 1st and the 5th dark band (assume that all 5 bands are on the same side of the midline)? Assume that the distance to the viewing screen from the 2 slit barrier is 1.85 meters.
(h) What is the approximate total angle between each of the two 3rd-bright-bands from one side of the midline over to the symmetrically opposite side of the midline?
[ NOTE: These 'bright bands' occur symmetrically both to the left and the right of the midline. We start 'counting bright bands' only AFTER we cross over the first of the dark bands that mark the outer edges of the single bright band (the central maximum) that is centered on the midline. ]
How can we get a simple but reasonable estimate of the angular middle of these bright areas of constructive interference?
(a) What colour is the neon light? Would we be able to see such light if its wavelength was doubled? halved?
(b) What is the frequency of the neon light described above? [ Assume v=c for light ('in vacuum', but also a good approximation for in-air too). Also, see above in the first of Q#2's two 'end-notes'. ] Would we be able to see such light if its frequency was doubled? halved?
(c) Are there any kinds of specialized vision-spectrum range-enhancing 'gear' that we could use to help us see any of the light we might not be able to see in the several different alternate cases described in parts (a) and (b) above? Look up and state one example each for this kind of gear for 'just beyond' each end of the visible-to-humans spectrum of electromagnetic wavelengths.
(d) Is(Are) there any animal(s)(note that snakes and other reptiles, as well as insects and spiders (etc...) are all also considered to be "animals") that can see, unaided, the(those) part(parts) of the spectrum that we might not be able to see in the several different alternate cases described in parts (a) and (b) above? Look up and state one example each for a specific animal that can see 'just beyond' the visible spectrum of electromagnetic wavelengths, one specific different animal for beyond each of the opposite ends of the visible-to-humans light spectrum.
(e) If the two slits of the experimental gear are 8.25 μm apart, what are the angles to the midline for each of the 1st and 2nd nodal lines that would lead to the 1st and 2nd dark bands on a viewing screen placed 'downstream' of the 2-slit barrier?
(f) What is the maximum number of dark bands possible given the original neon lamp's monochromatic wavelength and the distance between slits as given in part (e) above?
(g) If at least 5 dark bands were possible, what would be the total distance between the 1st and the 5th dark band (assume that all 5 bands are on the same side of the midline)? Assume that the distance to the viewing screen from the 2 slit barrier is 1.85 meters.
(h) What is the approximate total angle between each of the two 3rd-bright-bands from one side of the midline over to the symmetrically opposite side of the midline?
[ NOTE: These 'bright bands' occur symmetrically both to the left and the right of the midline. We start 'counting bright bands' only AFTER we cross over the first of the dark bands that mark the outer edges of the single bright band (the central maximum) that is centered on the midline. ]
How can we get a simple but reasonable estimate of the angular middle of these bright areas of constructive interference?