Question

If $\hat { \mathbf { r } }$ a unit vector along refracted ray into a medium of refractive index m and unit vector normal to boundary of medium directed towards incident medium, then law of refraction is –

• A. $\hat { \mathbf { r } }$.)
• B. $\hat { \mathbf { r } }$)
• C. $\hat { \mathbf { r } }$×)
• D. m($\hat { \mathbf { r } }$×

Answer 1

Answer: (C)

$\hat { \mathbf { r } }$×)

Answer 2

By snell's (×) = m ($\hat { \mathbf { r } }$×)