Related InterviewSolutions

• Assertion : For real objects, image formed by a convex mirror always lies between pole and focus. Reason : When object moves from pole to infinity, its image will move from pole to focus.A. (a) If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.B. (b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.C. (c) If Assertion is true, but the Reason is false.D. (d) If Assertion is false but the Reason is true.
• In order to obtain a magnification of, `-0.6` (minus 0.6 ) with a concave mirror, the object must be placed :A. at the focusB. between pole and focusC. between focus and centre of curvatureD. beyound the centre of curvature
• In order to obtain a magnification of, -1.5 with a concave mirror of focal length 16 cm, the object will have to be placed at a distance :A. between 6 cm and 16 cmB. between 23 cm and 16 cmC. between 48 cm and 32 cmD. beyound 64 cm
• When an object lies at the focus of a concave mirror, them the position of the image formed and its magnification areA. pole and unityB. infinity and unityC. infinity and infintyD. centre of curvature and unity
• Assertion : If magnification of real object is -2. Then, it is definitely a concave mirror. Reason : Only concave mirror can make real images of real objects.A. (a) If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.B. (b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.C. (c) If Assertion is true, but the Reason is false.D. (d) If Assertion is false but the Reason is true.
• The number of images formed by two plane mirrors inclined at `60^@` of an object placed symmetrically between mirror isA. 6B. 7C. 5D. infinite
• A point object is placed at equal distance 3 f in front of a concave mirror, a convex mirror and plane mirror separately (event-1). Now, the distance is decreased to 1.5 f from all the three mirror (event-2). Magnitude of focal length of convex mirror and concave mirror is f . Then choose the correct options.A. Maximum distance of object in event-1 from the mirror is from plane mirrorB. Minimum distanc of object in event-1 from the mirrro is from convex mirror.C. Maximum distance of object in event-2 from the mirror is from concave mirrorD. Minimum distance of object in event-2 from the mirror is from plane mirrror
• A ball swings back and forth in front of a concave mirror. The motion of the ball is described approximately by the equation `x= f cos (omega)t`, where f is the focal length of the mirror and x is measured along the axis of mirror. The origin is taken at the centre of curvature of the mirror. (a) Derive an expression for the distance from the mirror of the image of the swinging ball. (b) At what point does the ball appear to coincide with its image? (c) What will be the lateral magnifiaction of the image of the ball at time `t= T/2`, where T is time period of oscillation?
• Prove that for any value of angle i, rays `1 and 2` are parallel
• Two plane mirrors A and B are aligned parallel to each other as shown in the figure. A light ray is incident at an angle of `30^(@)` at a point just inside one end of A. The number of times the ray undergoes reflections (including the first one) before it emerges out is A. `29`B. `30`C. `31`D. `32`