Brainscape's Knowledge GenomeTM

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


See full index

IGCSEA > Topic 3 Waves > Flashcards

Topic 3 Waves Flashcards

1
Q

What is the formula for refractive index (n)?

A

n = sin(i)÷sin(r)

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

What is longitudinal wave?

A

where the vibrations in the wave are parallel to the direction the wave travels.

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

What is the wavelength?

A

distance between two crests or two compressions

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

What are transverse waves?

A

wave where the vibrations are at ninety degrees to the direction of the wave.

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

What is the amplitude?

A

maximum distance a vibrating particle moves from its equilibrium position .

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

What is the formula linking frequency and time period?

A

F=1÷t

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

What’s the time period?

A

A wave moves a distance of one length every time a particle in the wave makes one complete oscillation.
The time period (T) of a wave is described as:
1. The time it takes for a particle to move one complete oscillation.
2. The time it takes the wave to move a distance of one wavelength

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

What is the frequency?

A

Frequency (f) of a wave is described as:

  1. The number of oscillations made by a particle in one second
  2. The number of wavelengths that pass a point in one second
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the formula for critical angle?

A

Sin(c)=1÷n

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

What is frequency measured in?

A

Frequency is measured in hertz (Hz)

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

What is the law of reflection that waves obey?

A

The incident angle (i) equals the reflected angle (r)

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

What is the formula for the velocity of a wave?

A

V=f×λ

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

Name the order of the electromagnetic spectrum from the lowest frequency to the highest

A

Radio, microwaves, infrared, visible light, ultraviolet, x-ray, gamma ray

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

What is an example of a longitudinal wave?

A

Sound

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

What is reflection?

A

change in direction of a wave front at any interest between two different mediums so that the way from returns into the medium from which it is originated (or it can also be in your own word)

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

What is an example of a transverse wave?

A

Light

17
Q

What is refraction?

A

When waves change speed they change direction

18
Q

When a ray travels through a less optically dense medium what will happen to the ray?

A

The ray will travel faster

19
Q

What is the critical angle of a medium?

A

angle of incidence at which the angle of refraction is ninety degrees.

20
Q

What are gamma rays used for?

A

The ability to kill cells can come to our advantage:

hospitals expose medical equipment to gamma rays in order to kill any bacteria living on them

21
Q

What is total internal reflection?

A

when all of the light is reflected from a boundary and the angle of incidence is the same as the angle of reflection.

22
Q

What are the dangers of x-rays?

A

x-rays have both the ability to penetrate through objects and to ionse atoms and molecules if cells in our body or ionize this can lead to mutations and cancer

23
Q

What is the imaginary line at 90 degrees from a medium boundary?

A

The normal.

24
Q

A combination of all the wavelengths of the visible spectrum appears white. The the constituent colors/wavelength of white light can be separated using a prisim.
True or false

A

True

25
Q

What are the colors on the visible spectrum in order.

A

Red, orange, yellow, green, blue, indigo, violet

26
Q

When a wave goes from a less optically dense medium to a more optically dense medium does it bend towards or away from the normal?

A

Towards the normal

27
Q

What is refractive index?

A

therRefractive index is a measure of the bending of a light-ray when passing from one medium to another.

28
Q

When a wave goes from a more optically dense medium to a less optically dense medium does it bend towards or away from the normal?

A

Away from the normal.

29
Q

What are the uses of microwaves?

A

used to transmit information and they are generated and received by dishes

30
Q

What are the dangers of ultraviolet?

A

Overexposure to ultraviolet light can cause damage to the skin and can cause blindness.

IGCSEA (5 decks)

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