To obtain a magnification of 2.5, how far should an objec...
To obtain a magnification of 2.5, how far should an object be placed from the pole of a thin converging lens of focal length 10.20m?
0.13m
0.25m
0.28m
0.50m
Correct answer is C
v = 2.5u
F = uvu+v
0.2 = u×2.5uu+2.5u
u = 0.28m
Which of the following devices is used to determine the relative density of an acid? ...
Which of the following is not a part of the electro-magnetic spectrum? ...
A metal rod has a length of 100cm at 200oC. At what temperature will its length be 99.4cm. If t...
The direction of the magnetic field at a point in the vicinity of a bar magnetic is...