youngs double split experiment - fringe spacing Flashcards
on a given graph the fringe spacing is always
constant
what is the w
fringe spacing
what is the unit for fringe spacing
m
what are the three tricks we can use for ,measuring fringe spaces accurately
Measuring across multiple fringes and then dividing by the number of fringes.
Measuring at minima, rather than maxima.
Using red light.
what is the formula for fringe spacing
w = dy/s
what is D
Distance from the screen
what is s
split spacing
what happens when u decrease D
smaller fringe spacing
what happens when u decrease wavelength
smaller fringe spacing
what happens when u increase D
larger fringe spacing
what happens when u increase wavelength
larger fringe spacing
If we multiply the wavelength by
0.7 and keep everything else the same, then the fringe spacing will…
be multiplied by 0.7
what happens when white light is used
white central maxima
fringes going from blue(nearest) to red
fringes intensity decreasing
Blue light has a wavelength that is the smallest of all the colours of light.
This means that, compared to all the other colours of visible light, blue light produces a fringe spacing which is…
the smallest of all the different colours of light.
As red light has a wavelength that is the largest of all the colours of light, this means that it produces a fringe spacing which is the…
largest of all the different colours of light.
