When a ray of light passes through a thin walled hollow glass prism of thickness t and refractive index 1.5.which one is wrong?
Answer & explanation
Correct answer: option 2
$\text{Thin walled hollow prism} \Rightarrow \text{behaves like parallel glass slab}$
$\text{Angular deviation} = 0 \Rightarrow \text{True}$
$\text{No dispersion (emergent rays parallel)} \Rightarrow \text{True}$
$\text{Lateral shift} = t\left(1 - \frac{1}{\mu}\right) = t\left(1 - \frac{1}{1.5}\right) = \frac{t}{3} \neq \frac{2t}{3}$
$\text{Hence option 4 is incorrect, not option 2}$
The wrong statement is: Lateral shift is equal to $\frac{2t}{3}$.