The critical angle for light going from medium ‘x’ to medium ‘y’ is $\text{'}{\theta }^{\text{'}}$ . The speed of light in medium ‘x’ is $\text{'}{v}_x^{\text{'}}$ . The speed of light in medium ‘y’ is

• A

  $\frac{v_x}{\mathrm{t}\mathrm{a}\mathrm{n}\theta }$
• B

  $v_x\mathrm{s}\mathrm{i}\mathrm{n}\theta$
• C

  $v_x\mathrm{t}\mathrm{a}\mathrm{n}\theta$
• Correct answer
  D

  $\frac{v_x}{\mathrm{s}\mathrm{i}\mathrm{n}\theta }$

Hence, the correct answer is option: 'D'.