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When does Snell's Law of refraction fail...

When does Snell's Law of refraction fail ?

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Snell's Law of refraction fails when light is incident normally on the surface of a refracting medium. In that case, `i= 0, r = 0`. The ratio `sin i//sin r` is meaningless.
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PRADEEP-RAY OPTICS-Very Short Answer (b)
  1. For which medium is refractive index maximum ?

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  2. For which medium is refractive index minimum ?

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  3. When does Snell's Law of refraction fail ?

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  4. On what factors lateral shift of a ray on passing through a glass slab...

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  5. Can total internal reflection occur when light goes from a rarer to a ...

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  6. Which one has a greater critical angle diamond or glass ?

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  7. What is the relation between refractive index and critical angle for a...

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  8. Define Snell's law of refraction.

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  9. Does critical angle depend on colour of light ?

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  10. What is the cause of refraction of light ?

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  11. What is critical angle for a material of refractive index sqrt(2) ?

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  12. A beam of light is converging towards a certain point. A parallel side...

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  13. What is the basis of an optical fibre ?

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  14. Determine refractive index of a substance if critical angle is 45^@.

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  15. What is the ratio of velocities of two light waves travelling in vacuu...

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  16. What type of lens is a tumbler filled with water ?

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  17. What type of lens is an air bubble inside water ?

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  18. a lens of glass is immersed in water. How is power of lens affected ?

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  19. a convex lens forms a virtual image of an object. What is the position...

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  20. An object is placed at the focus of a concave lens. Where will be imag...

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