Waves and Optics

Question 1

Waves:

Longitudinal waves are waves in which the direction of vibration of the particle is _______ to the direction in which the wave travels.

Answer 1

A:

Parallel

Question 2

Waves:

Transverse waves are waves in which the direction of vibration of the particle is _______ to the direction in which the wave travels.

Answer 2

A:

Perpendicular

Question 3

Waves:

1 wavelength is 1 cycle. What is this in Radians?

Answer 3

A:

2π Radians

Question 4

Waves:

state the principle of superposition…

Answer 4

A:

The principle of superposition states that when two waves meet, the total displacement at a point is equal to the sum of the individual displacements at that point.

Question 5

Waves:

State what coherent means…

Answer 5

A:

constant phase difference

Question 6

Waves:

The First harmonic is the fundamental. what proportion of the wavelength is this?

Answer 6

A:

1/2 λ

Question 7

Optics:

When light passes from air into glass it bends ______ the normal.

Answer 7

A:

towards

Question 8

Optics:

When light passes into a less dense material it bends ______ from the normal.

Answer 8

A:

away

Question 9

Optics:

Total internal reflection can only happen if…?

Answer 9

A:

1: the incident substance has a larger refractive index than the other substance.
2: the angle of incidence > critical angle

Question 10

Optics

In a double slit experiment whatis the phase difference where a dark fringe is created?

Answer 10

A:

180 degrees out of phase