SC-483

Refraction

Lower Sec Science · Secondary 1 · Hard · Refraction

A student shines a light ray from air into a glass block at an angle of incidence of

30^\circ

. The refractive index of glass is 1.5. Using

n = \dfrac{\sin i}{\sin r}

, what is the angle of refraction

r

in the glass?

(Take

\sin 30^\circ = 0.5

and

\sin 20^\circ = 0.34

\sin 19^\circ = 0.33

\sin 35^\circ = 0.57

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