Different types of rays, Physics

1. A very narrow laser beam is shone into a sphere of solid glass that has uniform refractive index n>1 and radius ρ . The beam makes an angle α  in air with the normal to the surface of the sphere.

Sketch the path of the beam in the circular cross-section of the sphere defined by the normal and the beam direction and show all reflected and transmitted rays. Using Snell's Law at each reflection, explain why the beam cannot become a whispering gallery ray propagating around the inner surface of the sphere. 

2.  An asymmetric, multimode, step-profile slab waveguide has a core index of 1.5. The cladding index above the core has value 1.49 and the cladding index below the core has value 1.48. Rays propagate in the core in the x-z plane and make an angle θz relative to the z-axis along the centre of the waveguide.

(a) Determine the range of (positive) values of θz in degrees for which only bound rays will propagate along the waveguide.

(b) How many different types of rays can propagate along the waveguide?

Sketch a typical path for each type of ray.

(c) Determine the values of θz in degrees that delineate between the 3 types of ray paths.

Posted Date: 2/21/2013 5:29:42 AM | Location : United States







Related Discussions:- Different types of rays, Assignment Help, Ask Question on Different types of rays, Get Answer, Expert's Help, Different types of rays Discussions

Write discussion on Different types of rays
Your posts are moderated
Related Questions
who made einstein''s theory wrong and how?

why flashlight suddenly become dim or bright when shaked?

How is a wave front dissimilar from a ray ? Draw the geometrical, shape of the wave fronts when (i) light diverges from a point source, and (ii) light emerges out of a convex le

group velocity and phase velocity

The focal length of a concave mirror is 2 meters. An object is positioned 8 meters in front of the mirror. Where is the image of this object formed? Ans: The image of given ob


What do you mean by thermal neutron? What is its importance? What do you mean by annihilation of matter? Given an example

(a) A cast steel ring has a cross-sectional area of 600mm 2 and a radius of 25mm. Verify the mmf essential to establish a flux of 0.8mWb in the ring. Use the B-H curve for cast st

i need an assignment on spectrophotometer

the accelaration of a plane as it takes off would that be a vector or a scalar