Ch12: Waves 2

Question 1

What is the set up for Young’s double slit experiment?

Answer 1

Light diffracts through an initial single slit in phase; then passes through a double slit to create two coherent waves, viewed on a screen.

Question 2

What type of source of light did Young use in his experiment?

Answer 2

A monochromatic one.

Question 3

What is the equation for Young’s double slit experiment? Define the terms.

Answer 3

λ=(ax)/D where:
a: slit separation
D= distance from slits to screen
x= separation between fringes

Question 4

What is a stationary wave?

Answer 4

Two waves of the same frequency superposed

Question 5

What are nodes and antinodes?

Answer 5

A node is a point in a stationary wave where displacement cancels out, causing a total displacement of 0. An antinode is where the two waves are always in phase and produce greatest amplitude.

Question 6

What is the net energy transfer of a stationary wave?

Answer 6

0. Because the waves are travelling in opposite directions.

Question 7

How do you find wavelength from antinodes or nodes?

Answer 7

Distance between adjacent nodes or antinodes is half the wavelength.