Q 1 :    

Identify the physical quantity that cannot be measured using spherometer :                  [2024]

• Radius of curvature of concave surface

   

• Specific rotation of liquids

   

• Thickness of thin plates

   

• Radius of curvature of convex surface

   

Q 2 :    

Let $u$ and $v$ be the distances of the object and the image from a lens of focal length $f$. The correct graphical representation of $u$ and $v$ for a convex lens when $\left|u\right|>f$, is        [2025]