A beam of light is incident on a glass plate at an angle of incidence $ heta_i$. The re\fracted beam is observed to be at an angle of re\fraction $ heta_r$. If the re\fractive index of the glass is $n_g$, find the angle of incidence $ heta_i$ in terms of $ heta_r$ and $n_g$.

Question

A beam of light is incident on a glass plate at an angle of incidence $	heta_i$. The re\fracted beam is observed to be at an angle of re\fraction $	heta_r$. If the re\fractive index of the glass is $n_g$, find the angle of incidence $	heta_i$ in terms of $	heta_r$ and $n_g$.

Accepted Answer

\frac{n_g \sin 	heta_r}{\sin 	heta_r}

Post Utme Eksu 2025 Physics Question 25

A beam of light is incident on a glass plate at an angle of incidence $\theta_i$. The re\fracted beam is observed to be at an angle of re\fraction $\theta_r$. If the re\fractive index of the glass is $n_g$, find the angle of incidence $\theta_i$ in terms of $\theta_r$ and $n_g$.

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