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Light — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceLight1 Mark
MCQ
When a light ray passes from one medium $(\mu_1)$ to other medium $(\mu_2)$. Refraction does not take place in the following situation.
  • ✓
    For normal incidence
  • B
    $\mu_1 > \mu_2$
  • C
    $\mu_1 = \mu_2$
  • D
    $\mu_1 < \mu_2$
✓

Answer

Correct option: A.
For normal incidence
if $\text{i} =0^\circ$then $\text{r}=0^\circ$
if $\mu_1 =\mu_2 $ then $\text{i} = \text{r}$

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