CH-9 Physical Optics Leave a Comment / By abdulslambsn@gmail.com / October 6, 2025 Welcome To Your Quiz "CH-9 Physical Optics" Click on "Start Quiz" To Continue... 1. Light is the source to: Create energy Destroy energy Carry energy All of the above None 2. According to Newton, light travels in the form of: Photons Waves Carpascular Electrons None 3. Huygen proposed that light travels in space by means of wave motion in: 1960 1690 1680 1670 None 4. Light is the type of: Momentum Velocity Energy Acceleration None 5. The direction in which light energy is carried called: Ray Wave front Locus All of above None 6. A plane wave is obtained if a point source of light is passed at the focus of a: Glass Plane Lens Mirror None of these None 7. All the points on a primary wavefront can be considered at the source for the production of secondary wavelets is: Huygen principle Hertz principle Newton's principle Maxwell's principle None 8. Light waves are: Complex Monochromatic Mixture of monochromatic and complex None of these None 9. When waves pass from one medium to another: Their wavelength changes Their speed changes Frequency remains costant All of above None 10. The first explanation of wave nature of light was provided in 1801 by the experiment of: Maxwell Thomas Young Huygen Newton None 11. Huygen principle states that: Live travel in electromagnetic waves Light has dual nature Light travel in straight line All points on primary wavefront are source of secondary wavelets None 12. Interference effects of light was verified by: Bragg Newton Thomas Young None of the above None 13. Which one of the following is monochromatic light source: Light from simple lamp Light from sodium lamp Light from fluouscent Light from neon lamp None 14. When crest of one way falls over the trough of the other wave, this phenomenon is known as: Diffraction Polarisation Constructive interference Destructive interference None 15. In order to get interference of light waves: The sources should be monochromatic The sources should be phase coherent The law of super-position should be applicable All of above None 16. In Young's experiment if white light is used: Dark fringe will be seen Bright fringe will be seen Alternate dark and bright fringrs will be seen No fringe will be seen None 17. A thin layer of oil on the surface of water looks coloured due to: Transmission of light Polarization of light Interference of light None of these None 18. Soap films in sunlight appears coloured due to Diffraction of light Scattering of light Interference of light Dispersing of light None 19. A white light passed through a prism is: Polarized Dispersed Diffracted Deviated None 20. Newton's rings are formed due to: Reflection of light Polarization of light Interference of light Diffraction of light None 21. Michelson interferometer can be used to find the: Wavelength of light Wavelength of sound Velocity of sound Velocity of light None 22. Diffraction effects are: More for sharp edges Less for cylindrical Les for round edge Less for sharp edge None 23. Diffraction effects was discovered in 1801 by: Newton Henry Huygen W.L Bragg None 24. Interference effects of light were verified by: Thomas Young Newton Einstein W.L Bragg None 25. The main advantage of a grating over young's apparatus is the: Absence of bright light Greater deviation of light Absence of dark fringes Sharpness of bright lines None 26. The blue of the sky is due to Polarization Reflection Refraction Scattering None 27. The polarization of an electromagnetic waves is determined by: Electric field Magnetic field Both electric and magnetic The direction of waves None 28. A polarized is: A light filter To analyzsed polarized light Used in polarimeter And adjustsable shatter None 29. Young's double slit experiment proves: Dual nature of light Particle nature of light Wave nature of light None of these None 30. light on passing through a polaroid: Unpolarized Plane polarized Elliptically polarized Circularly polarized None 31. Wave length of light on the average is given by: 10⁻⁹ 10⁻¹⁰ 10⁻⁴ 10⁻⁶ None 32. The wavelength of X -rays is of the order of: 10 A⁰ 1000 A⁰ 1 A⁰ 100 A⁰ None 33. Wavelength of X- rays falling at glancing angle of 30⁰ on a crystal with atomic spacing 2 x 10⁻¹⁰ m for the first order diffraction is: 4x10⁻¹⁰ m 2x10⁻¹⁰ m 0.2 x 10⁻¹⁰ m 20 x10⁻¹⁰ m None 34. If 5000 lines per cm are ruled on a diffraction grating, then the slit spacing will be: 5 x10⁻³ A⁰ 0.02 m 2 x10⁻⁴ A⁰ 2 x10⁴ A⁰ None 35. The index of refraction of diamond is 2.0 velocity of light in diamond in m/sec. is: 6 x10⁸ 3 x 10⁸ 2 x 10⁸ 1.5 x 10⁸ None 36. When one mirror of a Michelson interferometer is move a distance of 0.5 mm, 2000 fringes are observed, the wavelength of light used is: 2000 A⁰ 1000 cm 5000 A⁰ None of these None 37. Direction of propagation of light ray is: Along the wavefront Perpendicular to wave front At the angle of 45⁰ to the plane of wavefront None of these None 38. One angstorm is equal to: 10⁻⁶ m 10⁻⁸ nm 10⁻¹⁰ nm 10⁻⁸ cm None 39. The carpuscular nature of light was given by: Huygen Maxwell Newton Thomas Young None 40. The shape of wave fronts depend upon: Shape of medium Viscosity of medium Density of medium All of above None 1 out of 8 Thanks For Taking This Quiz - Please See Your Answers/Results Below After Entering Your Name & Email... Name Email Time's up
