CUET Preparation Today
CUET
Physics
Ray Optics
Time taken by sunlight to pass through a window of thickness 8 mm and refractive index (3/2) is:
$4×10^{11}s$
$4×10^{-11}s$
$4×10^{-13}s$
$4×10^{13}s$
The correct answer is Option (2) → $4×10^{-11}s$
