Homework Help

Green light has a wavelength of 5.20 × 10−7 m and travels through the air at a speed...

user profile pic

happyface23 | Student, Grade 10 | eNoter

Posted February 13, 2012 at 9:04 AM via web

dislike 1 like

Green light has a wavelength of 5.20 × 10−7 m and travels through the air at a speed of 3.00 × 108 m/s. Calculate the . . .

 

frequency of green light waves with this wavelength.

Answer in units of Hz

2 Answers | Add Yours

user profile pic

enotechris | College Teacher | (Level 2) Senior Educator

Posted February 13, 2012 at 10:26 AM (Answer #1)

dislike 0 like

The frequency (f) is determined by the speed of light (c) divided by the wavelength of the light (l), or f = c / l, where f is in cycles per second or Hertz (Hz), c is in meters per second, and l is in meters. So:

1.  f = (3.00 * 10^8 m/s) / (5.2 * 10^-7 m)

2.  f = (.577 * 10^15  1/sec) =

3.  f = 5.77 * 10^14  Hz.

user profile pic

Jyotsana | TA , Grade 10 | Valedictorian

Posted February 21, 2014 at 11:21 PM (Answer #2)

dislike 0 like

Frequency= speed/wavelength

Speed=3.0*10^8

wavelength= 5.20*10^-7m

(3.0*10^8)/(5.20*10^-7)

Frequency=5.8*10^14Hz

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes