In the diagram above, a ray of light passes from glass into air, if the angle of incidence in glass is a and angle of refraction in air is \( \beta \) which of following statements is true???
\( \alpha = \beta \)
the efractive index of glass is \( \frac{sin\theta}{sin\alpha} \)
The ray suffers total internal reflection if \( \beta \) is greater than the critical angle
the efractive index of glass is \( \frac{sin\alpha}{sin\beta} \)
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no D is correct
the formula for refractive index=sin i/sin r (where i= angle of incidence and r= angle of refraction)
in the question the said that the angle of incidence in glass is a(alpha) and the angle of refraction is B (beta)
all you have to do is substitute in the values
therefore refractive index = sin a/sinB
None of the options is perfectly written, but the correct relationship is:
n = sinβ / sinα
So the intended correct choice is B, even though it's poorly written (they likely meant β instead of θ).
