A converging lens produces an image four times as large a...
A converging lens produces an image four times as large as an object placed 25cm from the lens. Calculate its focal length
100cm
33cm
29cm
20cm
Correct answer is D
M = vu
v = mu = 4 x 25 = 100m
1v+1u=1f
1100+125=1f
f = 20cm
The image of an object is located 6cm behind a convex mirror. If it's magnification is 0.6, calc...
The use of lenses is Not applicable in the ...
Total internal reflection will not occur when light travels from ...
Which of the following statements is/are not correct? ...
Light travels in straight lines. In which of the following is this principle manifested? I. Pinho...
Which of the following liquids has the highest surface tension? ...
The region around a magnet in which magnetic force can be expressed is known as ...
A device that converts mechanical energy into electrical energy is ...