Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
An image is considered 'real' if:
The NCERT text defines a real image as: 'The image is real if the rays actually converge to the point; it is virtual if the rays do not actually meet but appear to diverge from the point when produced backwards.'
Which of the following rays is NOT one of the convenient rays typically chosen for drawing ray diagrams for spherical mirrors?
The text lists four convenient rays: (i) parallel to principal axis, (ii) through center of curvature, (iii) through focus, (iv) incident at the pole. A 'ray incident at the edge... far from the pole' is not specifically mentioned as a convenient ray to use for simple ray tracing, especially for paraxial approximations.
If the lower half of a concave mirror's reflecting surface is covered with an opaque material, what effect will it have on the image of an object placed in front of it?
Example 9.1 in the NCERT text states: 'You may think that the image will now show only half of the object, but taking the laws of reflection to be true for all points of the remaining part of the mirror, the image will be that of the whole object. However, as the area of the reflecting surface has been reduced, the intensity of the image will be low (in this case, half).'
For a convex mirror, a parallel beam of paraxial rays incident on it will:
The NCERT text states: 'For a convex mirror, the reflected rays appear to diverge from a point F on its principal axis [Fig. 9.3(b)]. The point F is called the principal focus of the mirror.'
The geometric center of a spherical mirror is called its:
The NCERT text mentions: 'We have already studied that the geometric centre of a spherical mirror is called its pole...'
What is the characteristic of paraxial rays in the context of spherical mirrors?
The NCERT text describes paraxial rays as: 'We assume that the rays are paraxial, i.e., they are incident at points close to the pole P of the mirror and make small angles with the principal axis.'
The mirror equation $1/v + 1/u = 1/f$ and the magnification formula $m = -v/u$ (or $m=h'/h$) are valid for:
The NCERT text clearly states: 'With the proper use of sign convention, these are, in fact, valid for all the cases of reflection by a spherical mirror (concave or convex) whether the image formed is real or virtual.'
If a parallel paraxial beam of light were incident on a spherical mirror making some angle with the principal axis, the reflected rays would converge (or appear to diverge) from a point in a plane. This plane is called the:
The NCERT text mentions: 'If the parallel paraxial beam of light were incident, making some angle with the principal axis, the reflected rays would converge (or appear to diverge) from a point in a plane through F normal to the principal axis. This is called the focal plane of the mirror [Fig. 9.3(c)].'
For calculating image formation by spherical mirrors, heights measured upwards above the x-axis (principal axis) are taken as:
According to the Cartesian Sign Convention summary provided: 'The heights measured upwards above x-axis and normal to the principal axis of the mirror/lens are taken as positive. The heights measured downwards are taken as negative.'
What happens to a ray passing through the center of curvature (C) of a spherical mirror after reflection?
The NCERT text states this as a rule for ray tracing: 'The ray passing through the centre of curvature of a concave mirror or appearing to pass through it for a convex mirror. The reflected ray simply retraces the path.'
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.