Optics
In compound microscope, the focal length and aperture of the objective used is respectively
The focal length of the objective lens of a compound microscope is
For a compound microscope $$f_{objective } < f_{eye\ piece}$$
In compound microscope, the focal length and aperture of the objective used is respectively
The focal length of the objective of a compound microscope is $$ { f }_{ 0 }$$ and its distance from the eye piece is $$L$$. The object is placed at a distance $$u$$ from the objective. For proper working of the instrument,
Answer the following questions: (a )The angle subtended at the eye by an object is equal to the angle subtended at the eye by the virtual image produced by a magnifying glass. In what sense then does a magnifying glass provide angular magnification? (b) In viewing through a magnifying glass, one usually positions ones eyes very close to the lens. Does angular magnification change if the eye is moved back? (c) Magnifying power of a simple microscope is inversely proportional to the focal length of the lens. What then stops us from using a convex lens of smaller and smaller focal length and achieving greater and greater magnifying power? (d) Why must both the objective and the eyepiece of a compound microscope have short focal lengths? (e) When viewing through a compound microscope, our eyes should be positioned not on the eyepiece but a short distance away from it for best viewing. Why? How much should be that short distance between the eye and eyepiece?
In a compound microscope, the focal lengths of two lenses are 1.5 cm and 6.25 cm. If an object placed at 2 cm from objective and the final image is formed at 25 from eye lens, the distance between the two lenses is
This abnormality occurs due to monosomy (2n - 1); the individual has 2n = 45 chromosomes with 44 + XO genotype
The image formed by an objective of a compound microscope is
In a compound microscope, the intermediate image is
A compound microscope has two lenses. The magnifying power of one is $$5$$ and the combined magnifying power is $$100$$. The magnifying power of the other lens is
In a compound microscope the object of $$f_0$$ and eyepiece of $$f_e$$ are placed at distance $$L$$ such that $$L$$ equals
If $$m$$ compound microscope $$m_{1}$$ and $$m_{2}$$ be the linear magnification of the objective lens and eye lens respectively, then magnifying power of the compound microscope will be