MCQ 11 MarkThe phenomenon of light responsible for the formation of rainbow is $–$Areflection.Brefraction,✓dispersion.Dlateral inversion.AnswerCorrect option: C. dispersion.View full question & answer→
MCQ 21 MarkThe number of constituent colours of white light isA$5$B$3$✓$7$D$9$AnswerCorrect option: C. $7$View full question & answer→
MCQ 31 MarkWhen a ray of light travels from a rarer medium to a denser medium, itAbends towards the normal.✓bends away from the normal.Cdoes not deviate from its path.Dtravels along the normal.AnswerCorrect option: B. bends away from the normal.View full question & answer→
MCQ 41 MarkWhich of the following mirrors is used by dentists?✓ConcaveBconvexCplaneDconicalAnswerCorrect option: A. ConcaveView full question & answer→
MCQ 51 MarkIf the object is in front of a convex mirror, then the image is alwaysAreal.Binverted,✓diminished.Denlarged.AnswerCorrect option: C. diminished.View full question & answer→
MCQ 61 MarkThe image formed when reflected rays only appear to meet but do not actually meet isAreal.✓virtual,Cinverted.Dcannot sayAnswerCorrect option: B. virtual,View full question & answer→
MCQ 71 MarkWhen an object is placed at the principal focus of a concave mirror, the image will be formed at theAfocus.Bcentre of curvature,Cpole.✓infinity.AnswerCorrect option: D. infinity.View full question & answer→
MCQ 81 MarkWhich of the following relations is true for spherical mirrors?A$f = r$B$f = 2r$✓$r = 2f$D$2f = 3r$AnswerCorrect option: C. $r = 2f$View full question & answer→
MCQ 91 MarkThe geometrical centre of a spherical mirror is called theAcentre of curvature✓pole of the mirrorCprincipal focus.Dfocal length.AnswerCorrect option: B. pole of the mirrorView full question & answer→
MCQ 101 MarkA mirror in which the inner hollow surface is the reflecting surface is called a✓concave mirror.Bconvex mirror.Cplane mirror.Dhollow mirror.AnswerCorrect option: A. concave mirror.View full question & answer→