Lesson 1465 of 1524
Diffraction
Missing orders occur when an interference maximum and a diffraction minimum are located together
Practice this chapterMissing orders occur when an interference maximum and a diffraction minimum are located together A diffraction grating consists of a large number of evenly spaced parallel slits that produce an interference pattern similar to but sharper than that of a double slit
Diffraction can send a wave around the edges of an opening or other obstacle The intensity pattern for diffraction due to a single slit can be calculated using phasors as I = I 0 ( sin β ) 2 , where β = ϕ 2 = π a sin θ λ , a is the slit width, λ is the wavelength, and θ is the angle from the…
diffraction — bending of a wave around the edges of an opening or an obstacle. missing order — interference maximum that is not seen because it coincides with a diffraction minimum. diffraction grating — large number of evenly spaced parallel slits. hologram — three-dimensional image recorded on film by lasers; the word hologram means entire picture (from the Greek word holo , as in holistic).
Worked example
What does “diffraction” mean in Diffraction?
- 1Use the wording this chapter gives for diffraction.
- 2The book says: bending of a wave around the edges of an opening or an obstacle.
- 3Do not use the meaning of missing order. That term means interference maximum that is not seen because it coincides with a diffraction minimum.
Result: bending of a wave around the edges of an opening or an obstacle
Why. That is the meaning this chapter gives for diffraction.
Do not swap diffraction and missing order. diffraction means bending of a wave around the edges of an opening or an obstacle. missing order means interference maximum that is not seen because it coincides with a diffraction minimum.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.