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Directions:Study the information given below carefully and answer the question that follows:
A, B, C, D, E, F, G, H and I are nine houses. C is 2 km east of B. A is 1 km north of B. H is 2 km south of A. G is 1 km west of H. D is 3 km east of G, and F is 2 km north of G. I is situated just in middle of B and C, while E is just in middle of H and D.
The distance between E and G is (A) 1 km (B) 1.5 km (C) 2 km (D) 5 km
Question of the Day: A small charged ball is accelerated from rest to a speed v by a 300 V potential difference. If the potential difference is changed to 1200 V, What will the new speed of the ball be ?
Description : This is an interesting experiment to show the total internal reflection. We get the total reflection if the light enters to an optical less dense material and the incidence angle is big enough. The incidence angle at which the ray refracts exactly along the boundary line, is called the boundary angle of the total reflection. With the total reflection we can lead the light along the curved ways, as optic fibers or water jets.