AP_Physics_B_-_Diffraction

AP_Physics_B_-_Diffraction - Diffraction AP Physics B

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
    Diffraction AP Physics B
Background image of page 1

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

View Full DocumentRight Arrow Icon
Superposition . .AKA….Interference One of the characteristics of a WAVE is the ability to undergo INTERFERENCE . There are TWO types. We call these waves IN PHASE. We call these waves OUT OF PHASE.
Background image of page 2
Diffraction When light OR sound is produced by TWO sources a pattern results as a result of interference.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Interference Patterns Diffraction is normally taken to refer to various phenomena which occur when a wave encounters an obstacle. It is described as the apparent bending of waves around small obstacles and the spreading out of waves past small openings
Background image of page 4
Diffraction – The Central Maximum Suppose you had TWO sources each being allowed to emit a wave through a small opening or slit. The distance between the slits denoted by, d . The distance from the slit spacing to the screen is denoted by the letter, L . If two waves go through the slit and then proceed straight ahead to the screen, they both cover the SAME DISTANCE and thus will have constructive interference. Their amplitudes will build and leave a very bright intense spot on the screen. We call this the CENTRAL MAXIMUM .
Background image of page 5

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

View Full DocumentRight Arrow Icon
Here is the pattern you will see. Notice in figure 2 that there are several bright spots and dark areas in between. The spot in the middle is the BRIGHTEST and thus the CENTRAL MAXIMUM. We call these spots FRINGES . Notice we have additional bright spots, yet the intensity is a bit less. We denote these additional bright spots as ORDERS. So the first bright spot on either side of the central maximum is called the FIRST ORDER BRIGHT FRINGE . Figure 1 represents the intensity of the orders as we move farther from the bright central maximum. Figure 1
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/18/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.

Page1 / 22

AP_Physics_B_-_Diffraction - Diffraction AP Physics B

This preview shows document pages 1 - 7. Sign up to view the full document.

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