IB HL Physics Multiple slit interference
/A tutorial sheet of questions on multiple slit interference is given below.
- Laser light of wavelength 𝜆 passes through a double slit of separation d and slit width b. Describe the intensity pattern that is observed on a screen at a distance D from the double slit.
- Sketch a graph showing the intensity on the screen versus distance along the screen.
- Three parallel narrow slits are now used. Describe the interference pattern on the screen if the wavelength, slit spacing, slit width and distance to the screen are unchanged.
- A triple slit interference pattern is compared to a double slit interence pattern pattern using the same wavelength of light, slit spacing, slit width and distance from the slits. In the double slit pattern (a) the maxima are closer together and dimmer, (b) the maxima are closer together and sharper, (c) the maxima are the same distance apart and dimmer, (d) the maxima are the same distance apart and sharper
- Distinguish between primary maxima and secondary maxima. How many secondary maxima form between the primary maxima when 4 slits are used?
