ch24_review - A. Manalaysay PHY2054, Fall 2004 CHAPTER 24...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
A. Manalaysay – PHY2054, Fall 2004 CHAPTER 24 Interference: Whenever two or more beams of light hit the same point, they will interfere with each other. Complete Constructive Interference happens when the peaks of the first wave line up with the peaks of the second wave, and the troughs also line up. Complete Destructive Interference occurs when the troughs of one wave line up with the peaks of the other (and they cancel each other out). Double slit interference: Each slit acts as a source of light. At any point on the screen, the light hitting it has traveled to hit it is different depending on which slit it came from. Since the two beams travel different distances, they are not (necessarily) in phase. “Phase” refers to where along its cycle is the wave: peak, trough, or somewhere in between. The distance between one peak and the next is one full wavelength. The distance between a peak and the adjacent trough is half of a wavelength. Bright spots occur where there is constructive interference, where the peaks line up with the peaks. Thus, the bright spots occur where the two paths differ by a whole number of wavelengths: ------ bright spots The dark spots occur where there is destructive interference, where the peaks from one wave line up with the troughs of the other. Thus, the dark spots occur where the two paths differ by a half number of wavelengths (i.e. 1/2, 3/2, 5/2, 7/2, etc.):
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

ch24_review - A. Manalaysay PHY2054, Fall 2004 CHAPTER 24...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online