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An image can be real or virtual. A real image is formed when the rays of light actually intersect after reflectio..

Question: An image formed by a convex mirror is always ________. 1. virtual, erect and diminished 2. virtual, real and magnified 3. real, inverted and diminished 4. real, erect and magnified Answer: ..

The eye lens converges these light rays to form a real, inverted and diminished image on the retina. The light sensitive cells of the retina gets activated with the incidence of light and generate electric signal..

Question: A positive magnification greater than unity indicates _____________________. 1. real image 2. virtual image 3. neither real not virtual image 4. distorted image Answer: ..

Question: The image produced by a concave lens is ________. 1. always virtual and enlarged 2. always virtual and reduced in size 3. always real 4. sometimes real, sometimes virtual Answer: ..

For both type of lenses, the height of the object is always positive, while the height of the image may be + or - depending upon its nature. As per sign convention for lenses, the height of an inverted and real image is negative and hence the magnification of a lens is negative when ..

. Thus, height of an object and that of an erect image are positive and all distances measured below the principal axis are negative. Note: The rules are same as in case of spherical mirrors. The following table gives the sign convention for lenses: Types of lens U v f Height of the image Height of..

When an object is placed at infinity, the rays coming from it are parallel to each other. Let us consider two rays, one striking the mirror at its pole and the other passing through the centre of curvature. The ray which is incident at the pole gets reflected according to the law of reflection and..

Here we consider the two rays, one parallel to the principal axis and the other passing through the focus. The ray of light which is parallel to the principal axis passes through the focus after reflection. The other ray passing through the focus after reflection emerges parallel to the axis. Afte..

Here, we consider a ray of light which is parallel to the principal axis and another ray passing through the centre of curvature. The ray which is parallel to the principal axis passes through the focus and the ray which passes through the centre of curvature retraces its path. The reflected rays ..