When light goes from an optically rarer to an optically denser medium,
The correct relation between u, v and f is:
After reflection through a concave mirror, rays of light
A ray of light incident on the optical centre of a spherical lens, after refraction passes through:
Which one of the following materials cannot be used to make lens?
If a lens has a focal length, F = +12 cm, then it is a
Pencil immersed partly in water appears to be bent due to
Angle of incidence is
A student obtained a sharp image of a burning candle, placed at the farther end of a laboratory table, on a screen using a concave mirror. For getting a better value of focal length of the mirror, what should the student do?
When light goes from an optically denser to an optically rarer medium,
A simple magnifying glass consists of:
The focal length of a convex lens is
Whenever light goes from one medium to another, the characteristic that does not change is:
After refraction through a rectangular glass slab the emergent ray is
Angle of reflection is
If the refractive index of two media are equal, then
Is the optical centre always at the centre of lens?
If the image formed by a concave mirror is observed to be virtual, erect and larger than the object then the position of the object will be
Which of the following letter shows lateral inversion?
Drop of water behaves likes a
If a lens has a focal length, f = -12 cm. then it is a
A magnifying glass is a
If focal length of a spherical mirror is 20 cm, then its radius of curvature is equal to
To determine the focal length of convex lens by obtaining a sharp image of a distant object we generally follow the following steps which are not in proper sequence.
(a) Hold the lens between the object and the screen
(b) Measure the distance between the lens and the screen
(c) Select a well lit distant object
(d) Adjust the position of the lens to form a sharp image
The correct sequence will be
Harry is standing in front of a plane mirror at a distance of 6 m. His image on the other side will form at a distance of