Optics
In compound microscope, the focal length and aperture of the objective used is respectively
In a compound microscope, the image produced by the objective lens is :
In a compound microscope the image produced by the objective is real, enlarged and inverted because objective has smaller focal length than the object distance so, image is formed which is real, magnified and inverted.
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