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1.
Magnification at least distance of distinct vision of a simple microscope having its focal length 5 cm is
2.
If eye is kept at a depth 
inside water of refractive index and viewed outside, then the diameter of the circle through which the outer objects become visible, will be
inside water of refractive index and viewed outside, then the diameter of the circle through which the outer objects become visible, will be
3.
The impact of an image on the retina remains for
4.
An object is placed at a distance of 
from a convex lens of power 
. Find the position of the image
from a convex lens of power . Find the position of the image
5.
A light ray is incident upon a prism in minimum deviation position and suffers a deviation of 
. If the shaded half of the prism is knocked off, the ray will
. If the shaded half of the prism is knocked off, the ray will
6.
The Cauchy's dispersion formula is
7.
The solar spectrum during a complete solar eclipse is
8.
In an equilateral prism if incident angle is 
then minimum deviation is
then minimum deviation is
9.
Consider the following two statements A and B and identify the correct choice in the given answers
A: Line spectra is due to atoms in gaseous state
B: Band spectra is due to molecules
A: Line spectra is due to atoms in gaseous state
B: Band spectra is due to molecules
10.
A person suffering from 'presbyopia' (myopia and hyper metropia both defects) should use