Question

1. A jeweler can tell if a diamond is real, or if it is just glass. Explain. 2. If half the lens were covered up, would an image still form? Explain your reasoning. If half the lens were covered up, the image will still form and be seen however, it just won't be as intense as the original because some of the rays are being blocked but the other half aren't. 3. If a fish looks up vertically, how wide (in degrees) is the cone of light to the world in air? Explain. dark dark 4. Why is the concept of critical angle essential to fiber optics communication?

Answer 1

l.a If you place if you able to real ON we see we ave the diamond the newspaper read then it is fake diamond And scatters all directions original the light in diamond so Blurness can't read properly due to when diamond you Sparkle experi encing the its ability to bend refract light. when light strikes the pavillions angled surfaces if is bounded and refracted up Through the diamond's table to the naked eye. when a diamond does this well and Sparkles radiantly it is called Fr fake Brilliance is very kg. Due to it's total internal reflection property this Brilliance is occuring Or Brilliance Ve let refractive cater is n' and index of that of air is " we have from Critical angle Concept Simo h a oto Tamoc = h Sn² But Tande = U я- area can gh fish h Jha leh Jual The diameter that be Seen by fish is d = 2 Jm², Beyond this Can not see because of total internal reflection that is taking place. Fiber optic Communication Signal has to be Send from one place to the other with out loges with minimum losses. This will be achieved through Cove - Cladding interface of a Fiber by attaing the Condition of total internal reflection losses will be very output. ley so that signal transmitted effectivel 4 In Signal o cladding Core Now input Signal