RRB NTPC GS Ray Optics Mock Test Daily Tests General Awareness General Science Group D NTPC RRB November 17, 2020November 16, 2020TestsKindly Enter your Name and Email Address then Press Next to Start your Test. Name Email Address 1. A swimming pool looks shallower than it really is, when seen by a person standing outside near it, because of the phenomenon of (a)Deselect Answerrefraction of lightreflection of lightdispersion of lightNone of these2. Magnification produced by a rear view mirror fitted in vehiclesDeselect Answeris less than oneis more than oneis equal to onecan be more than or less than one depending upon the position of the object in front of it3. An object is immersed in a fluid. In order that the object becomes invisible, it shouldDeselect Answerbehave as a perfect reflectorAbsorb all light falling on itHave refractive index oneHave refractive index exactly matching with that of the surrounding fluid4. A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his textbook. Which of the following statements is correct?Deselect AnswerThe near point of his eyes has receded awayThe near point of his eyes has come closer to himThe far point of his eyes has come closer to himThe far point of his eyes has receded away5. A person standing in front of a mirror finds that his image is larger than himself. This implies that mirror isDeselect AnswerCovexPlanePlano convex6. The basic reason for the extraordinary sparkle of a suitably cut diamond is thatDeselect AnswerIt is very hardIt has a very high refractive indexIt has a very high transparencyIt has well-defined cleavage planes7. Endoscopy, a technique used to explore the stomatch or other inner parts of the body is based onthe phenomenon ofDeselect AnswerDiffractionInterferenceTotal internal reflectionPolarization8. Soap bubble looks coloured due toDeselect AnswerdispersionreflectioninterferenceAny one of these9. Which of the following phenomena of light are involved in the formation of a rainbow?Deselect AnswerReflection, refraction and dispersionRefraction, dispersion and total internal reflectionRefraction, dispersion and total internal reflectionDispersion, scattering and total internal reflection10. Twinkling of a star is due toDeselect Answeratmospheric refraction of sunlightatmospheric refraction of starlightlightening in the skynone of these11. Although each eye perceives a separate image, we do not see everything double becauseDeselect AnswerThe inverted image formed by one eye is re-inverted by the otherThe optic nerve fuses the two imagesOne eye words at one timeNone of these12. A plane mirror placed in front of a person is moved parallel to itself at a speed of 0.5 m/s away from the person. ThenDeselect AnswerThe image moves away from the person at a speed of 1 m/sThe image moves away from the person at a speed of 0.5 m/sThe image moves toward the person at a speed of 0.5m/sThe iamge move towards the person at a speed of 1 m/s13. Finger prints on a piece of paper may be detected by sprinkling fluorescent powder on the paper and then looking it intoDeselect AnswerMercury lightSunlightInfrared lightultraviolet light14. The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red lightDeselect Answeris scattered the most by smoke or fogis scattered the least by smoke or fogis absorbed the most by smoke or fogmoves fastest in air15. A normal eye is not able to see objects closer than 25 cm becauseDeselect Answerthe focal length of the eye is 25 cmthe distance of the retina from the eye-lens is 25 cmthe eye is not able to decrease the distance between the eye-lens and the retina beyond a limitthe eye is not able to decrease the focal length beyond a limit16 out of 15Click Submit Button to complete the Test.Join Our Telegram Channel for Latest Updates Click Here! Time is Up!RRB NTPC GS Ray Optics Mock TestRRB NTPC & Group D General Science Free Mock TestsProperties of Matters, Heat, SoundCells, Tissues, Plant PhysiologyJoin Our Telegram & Whatsapp Groups for Latest Updates!