## Friday 10/5 Lecture

$c=\lambda v$

Mariam Baghdasaryan 4F
Posts: 37
Joined: Fri Sep 28, 2018 12:29 am

### Friday 10/5 Lecture

Properties of Light: Friday 10/5 Lecture: When Professor Lavelle wrote v=m*s^-1 on the board was he referring to velocity? In my notebook, I wrote v as frequency, but I don't think that makes sense.

Isabel Bellon 4F
Posts: 30
Joined: Fri Sep 28, 2018 12:27 am

### Re: Friday 10/5 Lecture

I believe so. Unit for velocity is m/s or m*s^-1

Brian Chhoy 4I
Posts: 66
Joined: Fri Sep 28, 2018 12:16 am

### Re: Friday 10/5 Lecture

keep in mind that v= velocity, and that $\nu$= frequency(curly v). But yes in that case v is velocity

Linh Vo 2J
Posts: 61
Joined: Sat Apr 28, 2018 3:00 am

### Re: Friday 10/5 Lecture

I would like to add on that v in that case would be velocity because of the units correlation. However, you can also determine if it's velocity or frequency by the way it's written. v is often straight, while curly v represents frequency and often will use Hz or Hertz as units.

g orloff 1J
Posts: 45
Joined: Fri Sep 28, 2018 12:16 am

### Re: Friday 10/5 Lecture

just remeber the difference between v for velocity and curly v for frequency.

Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

### Re: Friday 10/5 Lecture

The greek letter nu is the curly v that represents frequency (in Hertz or s^-1), while the regular v represents velocity (in m/s or m*s^-1).

Minsub Lee 3E
Posts: 32
Joined: Fri Sep 28, 2018 12:25 am

### Re: Friday 10/5 Lecture

Just a general tip is to remember the formulas and what you're trying to solve for. If you have to solve for kinetic energy, then you know you have to use velocity in the formula Kinetic Energy = 1/2mv^2

DavidEcheverri3J
Posts: 36
Joined: Fri Sep 28, 2018 12:26 am

### Re: Friday 10/5 Lecture

Also, when measuring a photon's energy, you are dealing with nu (Hz)