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MCQs-PYQs-12th-jee

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 plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is

MCQs-PYQs-12th-jee

A point source of light B is placed at a distance L in front of the centre of a mirror of width d hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance 2 L from it as shown. The greatest distance over which he can see the image of the light source in the mirror is

MCQs-PYQs-12th-jee

To get three images of a single object, one should have two plane mirrors at an angle of

MCQs-PYQs-12th-jee

A light bulb is placed between two plane mirrors inclined at an angle of 60°. The number of images formed are

MCQs-PYQs-12th-jee

In an experiment to find the focal length of a concave mirror a graph is drawn between the magnitudes of u and v. The graph looks like

MCQs-PYQs-12th-jee

Two similar thin equi-convex lenses, of focal f each, are kept coaxially in contact with each other such that the focal length of the combination is F₁. When the space between the two lenses is filled with glycerin (which has the same refractive index (µ = 1.5) as that of glass) then the equivalent focal length is F2. The ratio F₁: F₂ will be

MCQs-PYQs-12th-jee

In total internal reflection when the angle of incidence is equal to the critical angle for the pair of medium in contact, what will be angle of refraction

MCQs-PYQs-12th-jee

Which colour of the light has the longest wavelength

MCQs-PYQs-12th-jee

Pick the wrong answer in the context with rainbow

MCQs-PYQs-12th-jee

A astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 cm away from the objective, the lenses must be separated by a distance

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