Question
What causes chromatic aberration?
✓
Answer
- Variation of focal length of lens with colour
Chromatic aberration occurs when a lens is either unable to bring all wavelengths of color to the same focal plane and/or wavelengths of color are focused at different positions in the focal plane.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Light rays from a source are incident on a glass prism of index of refraction μ and angle of prism α. At near normal incidence, the angle of deviation of the emerging rays is(a) (μ – 2)α (b) (μ – 1) α (c) (μ + 1) α (d) (μ + 2) α
The angle of incidence at which reflected light is totally polarized for reflection from air to glass $($refraction index $n)$ is
→An electron moving with a velocity of $15ms^{-1}$ enters a uniform magnetic field of $0.2 T$, along a direction parallel to the field. What would be its trajectory in this field?
→Gold-leaf electroscope can be used _______?
Light energy emitted by stars is due to(a) Breaking of nuclei(b) Joining of nuclei(c) Burning of nuclei(d) Reflection of solar light
A biconvex lens $(n=1.5)$ has equal radius of curvature each of 20 cm. The power of the lens is :
→A rectangular loop with a sliding connector of length $l = 1.0 m$ is situated in a uniform magnetic field $B = 2T$ perpendicular to the plane of loop. Resistance of connector is $r = 2W.$ Two resistance of $6W$ and $3W$ are connected as shown in figure. The external force required to keep the connector moving with a constant velocity $v = 2\ m/s$ is
→In an electric circuit containing a battery, the charge (assumed positive) inside the battery:
A radioactive substance emits(a) Electromagnetic radiation(b) Electrons revolving around the nucleus(c) Charged particles(d) a,c
Three resistances, each of $1$ ohm, are joined in parallel. Three such combinations are put in series, then the resultant resistance will be
→