Snell's Law : Class X CBSE / ICSE : Refraction of Light - Light / Don't memorize

Snell’s law
In optics, a relationship between the path taken by a ray of light in crossing the boundary or surface of separation between two contacting substances and the refractive index of each. This law was discovered in 1621 by the Dutch astronomer and mathematician Willebrord Snell (also called Snellius). The account of Snell’s law went unpublished until its mention by Christiaan Huygens in his treatise on light.

In the Figure, n1 and n2 represent the indices of refraction for the two media, and i and r are the angles of incidence and refraction that the ray makes with the normal (perpendicular) line at the boundary.

Snell’s law asserts that 
n1/n2 = sin r/sin i

Learn about the principles of light refraction
Because the ratio n1/n2 is a constant for any given wavelength of light, the ratio of the two sines is also a constant for any angle. Thus, the path of a light ray is bent toward the normal when the ray enters a substance with an index of refraction higher than the one from which it emerges; and because the path of a ray of light is reversible, the ray is bent away from the normal when entering a substance of lower refractive index.
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Link for
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[Smart_Soham]

Is the ratio sin i/sin r inversely proportional to the refractive indexes of the two medium?

[grhandloom]

i am in class 9 and having 4 chapter refraction of light at curved surfaces part1 and part 2 icse board

[Dip.gamer]

Limitation of snell' law
one video please

[riteshkumarkanti]

Thank you 💕😊 sir
. I never forgot this one thing you said to me. Educators love to hear how a phrase they uttered—like “double-check your work” or “learn from your mistakes instead of dwelling on them”—stuck in your mind. They’ll also be happy the words didn’t go in one ear and out the