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GENERALSCIENCE

REFRACTION OF LIGHT-IIप्रकाश का अपवर्तन-II

Lecture By

NEERAJ SIR

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SSC JE MECHANICAL COMPLETE COURSE

Sunday 27th Sept

1PM

REFRACTION OF LIGHT-IIप्रकाश का अपवर्तन-II

Lecture By

NEERAJ SIR

Laws of Refraction of Light

• The incident ray, the refractedray and the normal to thesurface all lie in the same plane.

1 Medium 1 माध्यम 1

Medium 2 माध्यम 2

Medium 1 माध्यम 1

Medium 2 माध्यम 2

Laws of Refraction of Light

• For pair of two mediumssnell’s law written as.

2. Snell’s Law

i

r

Critical Angle

• When light ray travels fromdenser medium to rarermedium, the angle of incidenceto which the angle of refractionbecome 90° is called the criticalangle.

। c

Critical Angle

• By snell’s law. स्नेल के ननयमसे :

c

Critical Angle

Material Refractive Index Critical Angle

Glass 1.5 42°

Water 1.33 49°

Diamond 2.4 24°

Total Internal Reflection

• When the incident angle is greater than the critical angle, light reflects inside the denser medium instead of refracting. This phenomenon is known as Total Internal Reflection.

i >c

SSC JE MECHANICAL COMPLETE COURSE