Soul Wavel3ngth
Badges: 12
Rep:
?
#1
Report Thread starter 3 months ago
#1
can pls explain how to find the critical angle even though you only know the RI of one of the materials?

the question is 2c): https://pmt.physicsandmathstutor.com...Refraction.pdf
0
reply
irllylikephysics
Badges: 4
Rep:
?
#2
Report 3 months ago
#2
Consider the refractive index of air as 1

(Original post by Soul Wavel3ngth)can pls explain how to finder the critical angle even though you only know the RI of one of the materials?

the question is 2c): https://pmt.physicsandmathstutor.com/download/Physics/A-level/Topic-Qs/AQA/03-Waves/Set-A
0
reply
hthain14
Badges: 10
Rep:
?
#3
Report 3 months ago
#3
Total internal reflection is when the light passing from a more dense medium is refracted by 90 degrees when it passes into a less dense medium (in this case from water to glass).

Total internal reflection takes place when the angle of incidence is greater than the critical angle.

What you have to do is calculate the critical angle, use your answer from 2b to get the angle of incidence, and compare them to prove that the statement in 2c is true.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Bournemouth University
    Undergraduate Open Day Undergraduate
    Wed, 19 Feb '20
  • Buckinghamshire New University
    Postgraduate and professional courses Postgraduate
    Wed, 19 Feb '20
  • University of Warwick
    Warwick Business School Postgraduate
    Thu, 20 Feb '20

Has your university offer been reduced?

Yes (43)
32.58%
No (68)
51.52%
Don't know (21)
15.91%

Watched Threads

View All