MYTUTOR SUBJECT ANSWERS

465 views

What is a critical angle and when does total internal reflection take place?

When a ray of light travels from a denser medium to a rarer medium it bends away from the normal. It the angle of incidence is too large, the angle of refraction will be very large as well (It can be proved by Snell's law). If the value of angle of incidence is higher than a certain value which is known as the critical angle, the ray of light doesn't travel to the rarer medium instead it gets internally reflected in the denser medium. The value of critical angle can be calculated by the following formulae. 

Critical angle = arcsin(nr/ni

Where nr is the refractive index of the rarer medium, ni is the refractive index of the denser medium and arcsin is sine inverse. 

Swapnil S. GCSE Maths tutor, GCSE Physics tutor, GCSE Chemistry tutor...

2 years ago

Answered by Swapnil, a GCSE Physics tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

136 SUBJECT SPECIALISTS

£36 /hr

Lorenzo C.

Degree: Biomedical Sciences with Honours in Infectious Diseases (Bachelors) - Edinburgh University

Subjects offered: Physics, Chemistry+ 1 more

Physics
Chemistry
Biology

“Hey! I'm Lorenzo and I study Biomedical Sciences with an honours in Infectious Diseases at the University of Edinburgh. I'd be happy to help you with Biology, Chemistry and Physics at GCSE or at A-Level.  I have previous experience tu...”

£18 /hr

Jan K.

Degree: Mathematics and Music (Bachelors) - Edinburgh University

Subjects offered: Physics, Maths

Physics
Maths

“About Myself I am a Mathematics student at Edinburgh University. I have a real passion for Mathematics, and I thouroughly enjoy explaining mathematical concepts to others. Having been home-educated all through school (which also gave ...”

£20 /hr

Jonathan P.

Degree: Physics (Masters) - Durham University

Subjects offered: Physics, Maths

Physics
Maths

“About Me: I am a Physics student at Durham University. My passion is physics, and by association maths, I will aim to instil asimilar passion in students during my tutorials. I am a highly patient and approachable individual.  I have...”

About the author

£18 /hr

Swapnil S.

Degree: BEng (Hons) Electrical and Electronics Engineering (Bachelors) - Manchester University

Subjects offered: Physics, Maths+ 2 more

Physics
Maths
Further Mathematics
Chemistry

“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

MyTutor guarantee

You may also like...

Posts by Swapnil

What can I say about the roots of a quadratic equation without actually calculating them?

What is a critical angle and when does total internal reflection take place?

Why are elements of group 0 chemically inert?

Other GCSE Physics questions

X-rays and gamma rays are two types of electromagnetic radiation, state two ways in which they differ from microwave radiation

What is teminal velocity?

Do batteries contain current, which comes out when they are in a circuit?

Why does resistance increase with temperature?

View GCSE Physics tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok