MCQ
The rays of different colours fail to converge at a point after going through a converging lens. This defect is called:
  • A
    Spherical aberration.
  • B
    Distortion.
  • C
    Coma.
  • Chromatic aberration.

Answer

Correct option: D.
Chromatic aberration.

The rays of different colours fail to converge at a Point after going through a converging Lens. This defect is called chromatic oberration.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

If a photon has velocity c and frequency n, then which of following represents its wavelength
A charged particle of charge $Q $ is held fixed and another charged particle of mass $m$ and charge $q$ (of the same sign) is released from a distance $r.$ The impulse of the force exerted by the external agent on the fixed charge by the time distance between $Q$ and $q$ becomes $2r$ is
A power line lies along the east-west direction and carries a current of 10 ampere. The force per metre due to the earth's magnetic field of $10^{-4}$ Tesla is
An energy of 24.6 eV is required to remove one of the electrons from a neutral helium atom. The energy (in eV) required to remove both the electrons from a neutral helium atom is
Consider the following statements :

$A.$ Atoms of each element emit characterstics spectrum.

$B.$ According to Bohr's Postulate, an electron in a hydrogen atom, revolves in a certain stationary orbit.

$C.$ The density of nuclear matter depends on the size of the nucleus.

$D.$ A free neutron is stable but a free proton decay is possible.

$E.$ Radioactivity is an indication of the instability of nuclei.

Choose the correct answer from the options given below 

What is a virtual image?
When a conducting wire $X Y$ is moved towards the right, a current flows in the anti-clockwise direction. Direction of magnetic field at point $O$ is
Whenever light travels from denser medium to a rarer medium:
In a Young's double slit experiment, slits are separated by $0.5\ mm$, and the screen is placed $150\ cm$ away. A beam of light consisting of two wavelengths, $650\ nm$ and $520\ nm$, is used to obtain interference fringes on the screen. The least distance from the common central maximum to the point where the bright fringes due to both the wavelengths coincide is...... $mm$
A thin plano-convex lens acts like a concave mirror of focal length $0.2 m$ when silvered from its plane surface. The refractive index of the material of the lens is $1.5.$ The radius of curvature of the convex surface of the lens will be.......$m$