Optics Answers

the core an cladding of an optical fiber has refractive indices 1.52 and 1.47 respectively.Find the numerical aperture.?

Suppose a boy 'A' is inside swimming pool near an edge. Suppose his friend 'B' is standing on the edge.Will 'A' find 'B' taller or shorter than usual height?Explain.

Can dispersive power be negative?Why?
What will be the sign of dispersive power if a hollow prism is immerged into water ?

What are the conditions of Young's double experiment?
What is monochromatic light?

Why light turns 2θ when mirror turns θ in measuring speed of light by Foucault method?

Briefly explain optical fibre?

what is visible light and where is it on electromagnetic spectrum?

In a medium of refractive index 1.6 and having a convex surface has a point object in it at a distance of 12cm from the pole.the radius of curvature is 6cm.locate the image as seen from air?

Refractive index of glass is 1.5 the time taken by light to travel a distance of 10 cm of glass is

when angle of incidence is equal to the brewster's angle, the reflected and refracted rays are perpendicular to each other. show it mathematically.