When a parallel beam of light passes through a convex lens, after refraction it:
converges to a point on the principal axis
A convex (converging) lens is thicker at the centre than at the edges. When a parallel beam of light (rays parallel to the principal axis) passes through it, the lens bends all rays inward so that they meet at a single point on the principal axis — the principal focus (F).
This is the defining property of a converging lens: it converges parallel light to the focal point. The image formed at the focal point is real, inverted, and highly diminished (point-sized).
The correct answer is A: converges to a point on the principal axis.
An image is formed at a distance of 30 cm from a convex mirror when the object is placed 40 cm from the mirror. The magnification produced by the mirror will be _______.
Which of the following is NOT the correct use of a concave mirror?
The image formed by a concave lens for an object at infinity is:
The magnification of a concave mirror is −1. Which of the following statements is correct about the position of the object?
The power of a lens is given as the reciprocal of its:
An object is placed at a distance of 40 cm from a convex lens of focal length 10 cm, such that an image is formed at a distance of X cm from the lens. What is the value of X?
A convex lens of focal length f will form a magnified real image of an object, if the object is placed.
A ray of light travelling in the direction \(\frac{1}{2} (\hat i + \sqrt 3 \hat j)\) is incident on a plane mirror. After reflection it travels along the direction \(\frac{1}{2} (\hat i - \sqrt 3 \hat j)\) The angle of incidence is:
Twinkling of stars is due to atmospheric
An optical fibre has a core material of refractive index of 1.55 and cladding material of refractive index of 1.50. The numerical aperture of the fibre is
A lens has a power of +2.0 Dioptre, Which one of the following statements about the lens is true?