Question

5. The refractive index of glass with respect to air is 2. Then the critical angle of glass air interface is​

Answer 1

Answer:

It is given that the refractive index of glass with respect to air is 2.

refractive index of air with respect to glass = 12.

Let the critical angle of the glass-air interface be icr.

When light passing from glass to air is incident at this angle, the angle of refraction is 90o.

sinisinr=μ⇒sinicrsin90o=12.

⇒sinicr=12⇒icr=arcsin(12)=30o.

⇒ The critical angle of the glass-air interface is 30o.

Answer 2

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• The refrective index of glass with respect to air is 2. Then the critical angle of glass air interface is....?

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We know that the critical angle is given by:-

C = sin^-1 × 1/μ

✍Where μ = reflective index of denser medium relative to rarer medium.✔

✔Here, μ = 2

$\sf{Hence,\: c = { sin }^{ - 1} \frac{1}{2}}$

$\sf\large{\implies\ C = 30degree}$☃️✔