Problem solving tips

## Wave Optics

- Want to score better marks in exams? Have a look at some problem solving tips.
1
Tips for: Calculating the thickness in thin films due to interference.
Interference between light waves is the reason that thin films, such as soap bubbles, show colorful patterns. The overall goal is to figure out the shift of the wave reflecting from one surface of the film relative to the wave that reflects off the other surface. Depending on the situation, this shift is set equal to the condition for constructive interference, or the condition for destructive interference.
Let's look at some problems.
2
Tips For: Calculating fringe width in Young's double slit experiment dipped in liquids.
If the Young's double slit experiment is dipped in water, the fringe width will decrease as the wavelength of light is lesser in water. Let's look at some tips on how to calculate the fringe width.
Let's solve some problems:
3
Tips For: Fresnel's biprism Method
In interference by fresnel's biprism method, a source is kept in front of biprism. Bipirsm makes two virtual images of a point source. The distance between the images is utilised as distance between slits in YDSE.
Let's solve some problems:
4
Tips For: Diffraction Grating
In diffraction grating N-slits are made. When number of slits increases, intensity of central maxima increases. But intensity of secondary maxima decreases by factor . minima and secondary maxima exist between two consecutive primary maxima.