Spherical Aberrations
Trending Questions
Q. What is the condition for which we consider two thin lenses to be in achromatic combination?
- The ratio of dispersive power of the thin lenses should be −1
- The ratio of dispersive power of the thin lenses should be 1
- The ratio of dispersive power of the thin lenses should be >1
- The ratio of dispersive power of the thin lenses should be <1
Q. 92. An achromatic convergent doublet of two lenses has a power +2D . The convex lens has a power +5D . The ratio of dispersive powers of the convergent and divergent lens is?
Q. A real image of a distant object is formed by a planoconvex lens on its principal axis. Spherical aberration is
- absent
- smaller if the curved surface of the lens faces the object
- smaller if the plane surface of the lens faces the object
- the same whichever side of the lens faces the object
Q. Which one of the following spherical lenses (shown with radius of curvature) doesn't exihibit dispersion?
Q. . A plano-convex lens is made of lint glass. Its focal length is (a) inversely proportional to the wavelength of light (b) longer for red than for blue (c) longer for blue than for red (d) the same for all colours
Q. to correct chromatic aberration if we are using combination of two lenses of same material we should keep there separation
f2-f1
f1+f2
f1+f2/2
in contact
Q. Spherical aberration in a thin lens can be reduced by
- Increasing the size of the lens
- Using a circular annular mark over the lens
- Using a doublet combination
- Using a monochromatic light
Q. Can lenses can combine and produce zero power if yes explai
Q.
if the far point of a eye lens is 1 metre . Find the power of lens required to correct the defect .
Q. A real image of a distant object is formed by a plano-convex lens on its principal axis. Spherical aberration
- Is absent
- Is smaller if the curved surface of the lens faces the object
- Is smaller if the plane surface of the lens faces the object
- Is the same whichever side of the lens faces the object
