How do you calculate the critical angle?

Question

You need to know the refractive index, I know that. In my case it is 1.4.

Answer 1

critical angle of medium= sine inverse of the regractive index. thats it.

Answer 2

Critical Angle Formula

Answer 3

The formula for calculating the critical angle with n (refractive index) is: critical angle = 1 /{sin(1 / n)}

Answer 4

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RE:
How do you calculate the critical angle?
You need to know the refractive index, I know that. In my case it is 1.4.

Answer 5

snell's law

n = refractive index = 1.4

sin critical angle = 1 / n

critical angle = 1 / n then the reverse of sin

no calculator so you need to work it out for yourself.!

Answer 6

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1/sin c = refractive index where c is the critical angle

Answer 7

use newton's second law sum of forces on object = mass x accel of object the forces are the component of gravity down the plane and the force of friction up the plane these have magnitude: component of gravity = mgsin(theta) friction = u mg cos(theta) so we have mg sin(theta) - u mg cos(theta) = 0 (for the case before the object slides) the condition that the object slides is g sin(theta)=u g cos(theta) where the relevant u is the coeff of static friction (us) since motion has not yet begun divide through by g cos(theta) to get us = tan(theta) if us = 0.55, then theta = arctan(0.55)=28.8 degrees and this is the critical angle.

Answer 8

n = (1 / sin critical angle)
sin critical angle = (1/n)
sin critical angel = (1/1.4)
critical angle = 45.6 degrees

am positive!

good luck sweetie

Answer 9

It's arcsin(n2/n1) where n2 is the refractive index of the less dense medium and n1 is the refractive index of the more dense medium. Since n2 is approximately 1, the answer in your case is approximately 45.6 degrees.

Answer 10

Isn't the critical angle 42º?