Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Module 2 - Phyics B1 > 2.4 - Optics > Flashcards

2.4 - Optics Flashcards

1
Q

What is light?

A

A form of electromagnetic radiation

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

What is visible light measured in?

A

nanometres (Nm) or Angstrom (A)

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

What are the wavelengths of Ultraviolet light?

A

less than 4,000 A

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

What are the wavelengths of Infrared light?

A

More than 7,000A

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

What is the speed of light?

A

3x10^8 m/sec

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

What is the formula for the speed of electromagnetic radiation (c)?

A

c = f x lamda
frequency x wavelength

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

What is the law of reflection?

A

The angle of incidence = the angle of reflection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What happens to refraction at 90 degrees?

A

There is no refraction

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

What happens to light wave-fronts when they refract?

A

They change direction

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

What is the equation for the focal length of a concave mirror?

A

f = 1/2 x R (radius of curvature)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What happens to an image in a concave mirror?

A

(Magnifying bathroom mirror)

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

What happens to an image in a convex mirror?

A

Diminished image and fit more detail in (car rear-view mirror)

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

What are the three parts to a fibre optic data link?

A

Transmitter, receiver and optical fibre.

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

What are the two basic types of fibres?

A

Multimode and single-mode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the cladding layer of an optical fibre?

A

A dielectric material reducing the loss of light into surrounding air, adds mechanical strength, reduces scattering at the surface of the core and protects the fibre from absorbing surface contaminants.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is Attenuation?

A

The loss of optical power as light travels along the fibre.

17
Q

What is bandwidth?

A

The amount of information that can be transmitted at one time.

18
Q

What is the SI unit of luminosity?

A

Candela

19
Q

What source of light do lasers use?

A

Coherent light

20
Q

What is meant by a fibre optic cable which is attenuated at 29dB/m?

A

This is the figure allowed when calculating power gain in a fibre optic cable

21
Q

What type of fibre optic cables are used in a flying control system?

A

Multi mode fibre

22
Q

What speed of light are fibre optic cables capable of transmitting light at?

A

1.99 x10^8 m/s (lower than speed of light in a vacuum)

Module 2 - Phyics B1 (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions