Ch 12 Light Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Define reflection.

A

Reflection is the bouncing of light off a surface.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The ray of light that hits the mirror surface is known as the _____ ray.

A

Incident Ray

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The ray of light that bounces off the mirror surface is known as the _____ ray.

A

Reflected Ray

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

The imaginary line perpendicular to the mirror surface at the point of incidence is known as the _____.

A

Normal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The angle between the incident ray and the normal is known as the angle of _____.

A

Incidence, i

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The angle between the reflected ray and the normal is known as the angle of _____.

A

Reflection, r

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the characteristics of an image formed are observed when light rays are reflected off a plane mirror?

A
  • Same Size
  • Laterally Inverted
  • Upright
  • Virtual
  • Distance between the image and the mirror = Distance between the object and the mirror
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Define refraction.

A

Refraction is the bending of a light ray as it travels from one optical medium to another.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the Snell’s Law? (also known as formula for refractive index, n)

A

sin i / sin r = constant
i = angle of incidence
r= angle of refraction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Formula for Refractive Index. (using speed of light)

A
n = c / v
n = medium
c = speed of light in vacuum
v = speed of light in medium
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Define total internal reflection.

A

Total internal reflection (TIR) is the phenomenon that involves the reflection of all the incident light off the boundary.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

State the 2 conditions needed for total internal reflection.

A

TIR only takes place when both of the following two conditions are met:

1) the light is in the optically more dense medium and approaching the optically less dense medium.
2) the angle of incidence is greater than the so-called critical angle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Define critical angle.

A

The angle of incidence in the optically denser medium in which the angle of refraction is 90 degrees in the optically less dense medium.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Formula for critical angle

A

n = 1 / (sin c)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly