GATE Mechanical 2023 | GA Question: 10

Question

An opaque pyramid (shown below), with a square base and isosceles faces, is suspended in the path of a parallel beam of light, such that its shadow is cast on a screen oriented perpendicular to the direction of the light beam. The pyramid can be reoriented in any direction within the light beam. Under these conditions, which one of the shadows $\mathbf{P}, \mathbf{Q}, \mathbf{R}$, and $\mathbf{S}$ is NOT possible?

• A. $\mathbf{P}$
• B. $\mathbf{Q}$
• C. $\mathbf{R}$
• D. $\mathbf{S}$

Answer 1

B is not possible because triangle ke side corner se start hoga