MCQ Science and Technology Class 9 Chapter 18 Maharashtra Board Observing Space : Telescopes 1. What type of reflecting telescope uses a plane mirror?CassegrainGalileanKeplerianNewtonianQuestion 1 of 202. What does the Cassegrain telescope use to reflect light back?Convex mirrorPlane mirrorConcave mirrorFlat lensQuestion 2 of 203. Where do light rays pass in a Cassegrain telescope?Through a side lensThrough a hole in the concave mirrorAround the mirrorThrough the convex mirrorQuestion 3 of 204. Where is India’s largest optical telescope located?PuneBengaluruNarayangaonNainitalQuestion 4 of 205. What is the diameter of India’s largest optical telescope?2 m45 m94 inches3.6 mQuestion 5 of 206. What type of waves do radio telescopes detect?Visible lightX-raysRadio wavesGamma raysQuestion 6 of 207. What is the shape of the dishes in a radio telescope?CircularFlatParabolicSphericalQuestion 7 of 208. Where is the radio receiver placed in a radio telescope?At the edge of the dishOn the concave mirrorBehind the eyepieceAt the focal pointQuestion 8 of 209. What processes the information from a radio telescope?A lensA computerAn eyepieceA mirrorQuestion 9 of 2010. Where is the Giant Meterwave Radio Telescope (GMRT) located?NainitalNarayangaonBengaluruPuneQuestion 10 of 2011. How many dishes does the GMRT consist of?20453025Question 11 of 2012. What is the diameter of each dish in the GMRT?25 m94 inches3.6 m45 mQuestion 12 of 2013. What is the effective diameter of the GMRT as a single dish?45 m3.6 m25 km2 mQuestion 13 of 2014. What do scientists study using the GMRT?Ocean currentsTerrestrial plantsSolar system and pulsarsEarth’s atmosphereQuestion 14 of 2015. Why can optical telescopes be erected on Earth’s surface?They detect X-raysVisible light passes through the atmosphereThey use radio wavesThey are unaffected by sunlightQuestion 15 of 2016. What reduces the intensity of visible light reaching Earth?Mirror reflectionAtmospheric absorptionLens distortionRadio interferenceQuestion 16 of 2017. What causes the image position to shake in ground-based telescopes?Mirror weightLens sizeAtmospheric turbulenceRadio wavesQuestion 17 of 2018. Why can’t optical telescopes be used during the day?Mirror distortionSunlight interferenceLens weightRadio wave blockageQuestion 18 of 2019. Where are optical telescopes often situated to reduce observation problems?In citiesNear oceansIn valleysOn mountains in uninhabited placesQuestion 19 of 2020. What is the benefit of placing telescopes in space?They are cheaperThey detect radio wavesThey use smaller mirrorsThey avoid atmospheric problemsQuestion 20 of 20 Loading...
Leave a Reply