An object 40 cm high is 30cm from the pin hole camera. If...
An object 40 cm high is 30cm from the pin hole camera. If the height of the image formed is 20 cm. What is the distance of the image from the pin height?
15 cm
70 cm
40 cm
40 cm
Correct answer is A
M → HiHo = DiDo
where M is the magnification, Hi is the height of the image, Ho is the height of the object, Di is the distance from the lens to the in-focus projected image, and Do is the distance from the object to the lens.
But Di = Hi∗DoHo → 20∗3040
Image distance(Di) = 15cm
The process whereby a substance changes from a solid to liquid when heat is applied, is called? ...
A member of the crew of a SPACESHIP experiences weightlessness in a space when they ...
A lead-acid accumulator is used in preference to a dry battery in a car because ...
Shadows and eclipse result from the ...
In which of the following is a stationary wave produced? i. A vibrating turning fork held near th...
The speed of an object in rectilinear motion can be determine from the ...
Two balls X and Y weighing 5 g and 50 kg respectively were thrown up vertically at the same tim...