Question

Aparaxial beam is incident on a glass (n = 15)
hemisphere of radius R-6 om in air as shown
The distance of point of convergence from the
plane surface of hemisphere is
(1) 12 cm (2) 5.4 cm (3) 18 cm (4) 8 cm​

Answer 1

q$<marquee>A force F when acts on a body, displaces it by a distance d in a direction at an angle  with the direction of force. Write an expression for the work done by the force</marquee>$

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