In an optical instrument like a telescope, the combination of field le

1.	In an optical instrument like a telescope, the combination of field lens and eye lens forms
A.	an objective
B.	compound eye-piece
C.	magnifier
D.	None of the above
Answer» C. magnifier

Discussion

No Comment Found

Related MCQs

A Fraunhofer diffraction is produced form a light source of 580 nm. The light goes through a single slit and onto a screen a meter away. The first dark fringe is 5.0 mm form the central bright fringe. What is the slit width?
A Plano-convex lens (focal length f2 refractive index μ2 radius of curvature R) fits exactly into a plano-concave lens (focal length f1, refractive index μ1, radius of curvature R). Their plane surfaces are parallel to each other. Then, the focal length of the combination will be
A parallel beam of light is incident on a glass item behind curtain ABCD. The emergent rays coming out from the item are as given in the following figure. Which item could be behind the curtain?
An optical fibre has a core material of refractive index of 1.55 and cladding material of refractive index of 1.50. The numerical aperture of the fibre is
A spherical mirror and thin spherical lens have each of focal length of + 25 cm. The mirror and the lens are likely to be
A concave mirror produces a three times magnified (enlarged) real image of an object placed at 10 cm in front of it. Which option describes the image currently?
For reflection in a convex mirror the correct signs of 'u' (object distance), 'v' (image distance) and 'f' (focal length) are ___________.
An object 5 cm in length is placed at a distance 20 cm infront of convex mirror of radius of curvature 30 cm. Find the position of image.
A ray of light is made incident on a concave mirror, parallel to its principal axis. After reflection it will -
Intensify of light is due to

In an optical instrument like a telescope, the combination of field lens and eye lens forms

Discussion

No Comment Found

Related MCQs

Reply to Comment