When light passes from one medium to another, this phenomenon of change in its direction is called _____.
1). Refraction
2). Diffraction
3). Propagation
4). No option is correct
2. Conversion of sound energy into electrical energy is done by
3. The Instrument used to see the distant objects on the Earth is
4. The reason for a swimming pool to appear less deep than the actual depth is
5. The mass of a star is two times the mass of the Sun. How it will come to an end ?
6. Sound following a flash of lightning is called
7. Who among the following is credited for the Corpuscular theory of light?
8. When hot liquid is poured into a thick glass tumbler, it cracks because glass :