JEE Main 2021 (26 Feb, Shift 2) Physics Q17: The incident…

Question

The incident ray, reflected ray and the outward drawn normal are denoted by the unit vectors $\vec{a}$, $\vec{b}$ and $\vec{c}$ respectively. Then choose the correct relation for these vectors.

Accepted Answer

Option 2: $\vec{b} = \vec{a} - 2(\vec{a} \cdot \vec{c})\vec{c}$

Answer

$\vec{b} = \vec{a} - \vec{c}$

Answer

$\vec{b} = \vec{a} - 2(\vec{a} \cdot \vec{c})\vec{c}$

Answer

$\vec{b} = \vec{a} + 2\vec{c}$

Answer

$\vec{b} = 2\vec{a} + \vec{c}$

JEE Main 26 February 2021, Shift 2, Physics Q17