Quiz on Light and Optics Test 1 (physics) Welcome to your Quiz on Light and Optics Test 1 (physics) Name Email 1.‘Myopia’ is also known as: (a) near-sightedness (b) astigmatism (c) presbyopia (d) far-sightedness None 2.What is the full form of LED? (a) Linear Emergency Device (b) Light Emitting Diode (c) Liquid Emitting Display (d) Light Emitting D None 3.An image formed on a screen is called a ______ image, whereas the image formed by a plane mirror is called a ______ image. (a) real; virtual (b) parabolic; perpetual (c) virtual; real (d) vector; layered None 4.. The colour of the clear sky is blue due to the phenomenon of: (a) dispersion of light (b) reflection of light (c) scattering of light (d) refraction of light None 5. People who wear bifocal lenses have ______. (a) hypermetropia (b) myopia (c) presbyopia (d) cataract None 6.Which of the following types of mirrors show a lateral inversion of light? (a) Convex mirror (b) Concave mirror (c) Rectangle mirror (d) Plane mirror None 7.Which of the following mirror is used in vehicles as a headlight? (a) Double Convex mirror (b) Plane mirror (c) Concave mirror (d) Convex mirror None 8. Apart from the red and green wavelengths of sunlight, which other wavelength of sunlight is absorbed by water molecules in the ocean? (a) Orange (b) Blue (c) Violet (d) Yellow None 9. The absolute refractive index of ______ is 2.42. (a) air (b) diamond (c) crown glass (d) water None 10.How many colours does sunlight consist of? (a) Three (b) Two (c) Seven (d) Five None 11.Which phenomenon deals with the scattering of light by molecules of a medium when they are excited to vibrational energy levels? (a) Huygens Effect (b) Maxwell Effect (c) Raman Effect (d) Rayleigh Effect None 12.The phenomenon of deviation of light rays from their original path, when they pass from one medium to another, is called ____ (a) obstruction (b) reflection (c) Diffraction (d) Refraction None 13. Which among the following has its refractive index closest to that of crown glass ? (a)Canada balsam (b)Sapphire (c)Diamond (d)Ruby None 14.The total number of images formed by two mirrors inclined at 120° to each other is ______. (a) 1 (b) 2 (c) 4 (d) 3 None 15. What is the colour of the light emitted by the Sun ? (a) Yellow (b) Orange (c) Red (d) White None 16.What is the name of the phenomena (derived by scattering of the light) in which mountain tops acquire a rosy or orange hue around sunrise and sunset ? (a) Brillouin scattering (b) Circle of confusion (c) Alpenglow (d) Barrel distortion None 17.The part of the eye which is responsible for the conversion of image of an object into neural signals is: (a) iris (b) optic nerve (c) vitreous humour (d) retina None 18.Image formed by a Plane Mirror is always ______. (a) Virtual and Erect (b) Real and Erect (c) Real and Inverted (d) Virtual and Inverted None 19. Mirror used by dentists to see large images of teeth of patients is ______. (a) ZigZag Mirror (b) Plane Mirror (c) Convex Mirror (d) Concave Mirror None 20. Which of the following is the instrument used in submarines to view objects above sea level ? (a) Odometer (b) Pyrheliometer (c) Hypsometer (d) Periscope None 21.Twinkling of stars is mainly due to which phenomenon ? (a) Diffraction (b) Refraction (c) Reflection (d) Advection None 22.What will be the size of the image formed by a concave mirror when an object placed between Pole and Focus? (a) Same Size (b) Enlarged (c) Point Size (d) Diminished None 23.Fulminology is the study of: (a) Volcanic eruptions (b) Lightening (c) Natural gases (d) Atmosphere None 24. The sky appears blue due to: (a) Refraction of light (b) Dispersion of light (c) Scattering of light (d) Reflection of light None 25.. The Tyndall Effect is due to: (a) Scattering of Light (b) Dispersion of LIght (c) Refraction of Light (d) Reflection of Light None 26.The lens-type commonly used for correcting presbyopia is ______. (a) bifocal lens (b) cylindrical lens (c) convex lens (d) concave None 27. Light rays enter the eye through the outer, transparent structure at the front of the eye called the______. (a) Lens (b) Iris (c) Cornea (d) Optic nerve None 28. Rajat has hypermetropia. What type of lens will the ophthalmologist recommend to correct his vision? (a) Bifocal (b) Concave (c) Progressive (d) Convex None 29.Which instrument is used to measure the intensity of light produced by an unknown source in terms of a standard source? (a) Photometer (b) Calipers (c) Ammeter (d) Dynamometer None 30.The amount of light entering into eye can be controlled and regulated by- (a) iris (b) cornea (c) pupil (d) retina None Time's up
