Optics
In compound microscope, the focal length and aperture of the objective used is respectively
In a compound microscope, the intermediate image is
In a compound microscope, the intermediate image real, inverted and magnified
The compound microscope consists of two optical components (thus the term compound): the objective lens system, which has a very short focal distance and is placed very close to the object; and the ocular or eyepiece system, which has a longer focal length, lower magnification; and which further magnifies and projects the image onto the retina of the eye. The objective lens projects a real image (the intermediate image) of the object up in the body of the microscope onto the objective conjugate image plane or primary image plane
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
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
The focal length of the objective lens of a compound microscope is