## Speed of light

$c=\lambda v$

lasarro
Posts: 55
Joined: Thu Jul 11, 2019 12:15 am

### Speed of light

Why do we use the speed of light to calculate the wavelength and frequency of electromagnetic waves, like radiowaves?

nicolely2F
Posts: 149
Joined: Sat Sep 14, 2019 12:17 am

### Re: Speed of light

EM waves typically travel at the speed 3x10^-8 m/s. Because light is a type of EM wave (and light waves are used in many scenarios), we call it the speed of light.

alexfwang3g
Posts: 50
Joined: Thu Jul 11, 2019 12:16 am

### Re: Speed of light

All EMR moves at the speed of light. Since the calculations utilized is regarding to a type of light, then naturally we should use 3x10^-8 m/s as well.

Audrie Chan-3B
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

### Re: Speed of light

The units from wavelength (m) and frequency (s) give velocity (m/s). The speed of light is essentially the velocity for these two factors because we are dealing with light waves.

Megan Ngai- 3B
Posts: 50
Joined: Fri Aug 09, 2019 12:17 am

### Re: Speed of light

Electromagnetic radiation moves at the speed of light

Because the calc is about a type of light, c= 3x10^-8 m/s is used.

Anthony Hatashita 4H
Posts: 103
Joined: Wed Sep 18, 2019 12:21 am

### Re: Speed of light

Any EMR has the same speed, we just call it the speed of light (c)

stephaniekim2K
Posts: 79
Joined: Fri Aug 09, 2019 12:16 am

### Re: Speed of light

Typically, if not mentioned, you use the speed of light in a vacuum.

emwoodc
Posts: 55
Joined: Fri Aug 09, 2019 12:16 am

### Re: Speed of light

EMR is the speed of light so we typically use it

DMuth_1J
Posts: 63
Joined: Thu Jul 11, 2019 12:15 am

### Re: Speed of light

The speed of light is a constant. No matter what kind of light or what variant of light, the wavelength multiplied by the frequency of a specific light sample being studied will always equal this constant 2.98x10^8 m/s

Chantel_2I
Posts: 109
Joined: Sat Sep 07, 2019 12:19 am

### Re: Speed of light

The speed of light can be used in regard to all types of electromagnetic radiation.

chrischyu4a
Posts: 52
Joined: Thu Jul 25, 2019 12:16 am

### Re: Speed of light

All electromagnetic radiation is light itself which is why they all travel at 3*10^8 m/s. The factors that distinguishes the types of EM waves are frequency and wavelength.

Kevin Liu 1J
Posts: 53
Joined: Thu Jul 25, 2019 12:16 am

### Re: Speed of light

speed of light is 2.998 x 10^8 m/s and this is utilized as waves are part of the light spectrum. Hope this helps!

HuyHa_2H
Posts: 100
Joined: Wed Sep 11, 2019 12:15 am

### Re: Speed of light

Electromagnetic radiation move at the same speed as the speed of light hence we use the constant 2.998 x 10^8 m/s for both subjects.

RobertXu_2J
Posts: 104
Joined: Fri Aug 30, 2019 12:17 am

### Re: Speed of light

Electromagnetic radiation travels at the speed of light, therefore we use the speed of light to calculate it. Light is a form of electromagnetic radiation, and the speed of light is really the speed of all these EM waves.