Homework Help

a monochromatic light passes from glass into air. When the incident angle of `theta`...

user profile pic

handsofgod | (Level 2) eNoter

Posted July 5, 2013 at 12:03 PM via web

dislike 0 like

a monochromatic light passes from glass into air. When the incident angle of `theta` equals 30 degrees, the refraction angle of `phi` equals 45 degrees. The absolute refractive index of air `n_A` is 1. Let the frequency of the monochromatic light be 5x10^4 Hz.


Find the absolute refractive index of glass, `n_G`

 

Images:
This image has been Flagged as inappropriate Click to unflag
Image (1 of 1)

1 Answer | Add Yours

user profile pic

llltkl | College Teacher | (Level 3) Valedictorian

Posted July 5, 2013 at 5:48 PM (Answer #1)

dislike 1 like

According to Snell's law, considering refraction of light from glass into air,

`sintheta_i/sintheta_r=n_A/n_G`

Plugging in the values,

`sin30/sin45 = 1/n_G`

`rArr n_G=sqrt2 = 1.414` (approximately).

Therefore, the absolute refractive index of glass `n_G=1.414` 

Sources:

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes