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Across: 2. Light propagates rectilinearly, due to 5. The phenomena which is not explained by Huygen’s construction of wavefront 6. According to Huygens’ principle, light is a form of 9. A double slit interference experiment is carried out in air and the entire arrangement is dipped in water. The fringe width
Down: 1. The idea of secondary wavelets for the. propagation of a wave was first given by 2. A continuous locus of particles of medium vibrating in the same phase at any instant is known as 3. The wavefront due to a source situated at infinity is 4. When exposed to sunlight, thin films of oil on water of ten exhibit brilliant colours due to the phenomenon of 7. When compact disk is illuminated by a source of white light, coloured lines are observed. This is due to 8. In Young’s double slit experiment, if the monochromatic source of yellow light is replaced by red light, the fringe width