Wave Optics Questions and Answer >> 26. According to - TopicsExpress

Wave Optics Questions and Answer >> 26. According to corpuscular theory of light, the different colours of light are due to Different electromagnetic waves Different size of the corpuscles Different force of attraction among the corpuscles None of the above Answer & Explanation Answer: Different size of the corpuscles Explanation: According to Corpuscular theory different colour of light are due to different size of Corpuscules View Answer Report Error Let us discuss 27. In the interference pattern, energy is Created at the position of maxima Conserved but is redistributed Destroyed at the position of minima None of the above Answer & Explanation Answer: Conserved but is redistributed Explanation: In interference of light the energy is transferred from the region of destructive interference to the region of constructive interference. The average energy being always equal to the sum of the energies of the interfering waves. Thus the phenomenon of interference is in complete agreement with the law of conservation of energy. View Answer Report Error Let us discuss 28. A star emits light of 5500 Å wavelength. Its appears blue to an observer on the earth, it means. [DPMT 2002] Star is going away from the earth Star is coming towards earth Star is stationary None of the above Answer & Explanation Answer: Star is coming towards earth Explanation: Blue radiations have the wavelength around 4600 . It shows that apparent wavelength is smaller than the real wavelength. It means that the star is proceeding towards earth. View Answer Report Error Let us discuss 29. Wavelength of light of frequency 100Hz. [CBSE PMT 1999] 2 * 106 m 4 * 106 m 3 * 106 m 5 * 106 m Answer & Explanation Answer: 3 * 106 m Explanation: λ = c/v = 3 * 10⁸ / 100 = 3 * 10⁶ View Answer Report Error Let us discuss 30. Wavefront of a wave has direction with wave motion. [RPMT 1997] Parallel Opposite Perpendicular At an angle of θ Answer & Explanation Answer: Perpendicular Explanation: Direction of wave is perpendicular to the wavefront.

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