What happens when white light passes through two double slits?
It is dispersed into all the colours of the visible spectrum
Each colour has its own range of wavelengths.
What causes dispersion of light?
The refractive index of light (n) is slightly dependent on the frequency of light
This dependency leads to different colours bending at different angles.
In the visible spectrum, how should wavelength answers be formatted?
. # # x10-7 m
The first three numbers before the x10-7m will be between 4 and 7.5.
What is the range for the first three numbers in the wavelength format?
4.00 to 7.50
Outside this bound, the light isn’t visible and is on another part of the spectrum.
How do you convert a wavelength from meters to nanometers?
Multiply by 10^9
For example, 5.75x10-7m equals 575nm.
What is the equivalence of 5.75x10-7m in nanometers?
575nm
5.75x10-7m = 0.000000575m = 575x10-9m.
In a Young’s experiment, if the slits are 0.0080mm apart and the screen is set at 0.50m, what is being measured?
The colour of laser being used
The position of the bright lines helps determine the wavelength and thus the colour.
Double Slit Experiment With Particles (Electrons)
What is going on?
In the double-slit experiment, electrons are fired at two slits and detected on a screen. If electrons acted only as particles, two bands would appear. Instead, many bands form an interference pattern, showing wave behavior. Each electron hits the screen as a single point, but over time the pattern builds up. This demonstrates wave–particle duality: electrons behave like waves while traveling and like particles when detected.
