If the focal length of a camera lens is 20cm, the distance from the film at which the lens must be set to produce a sharp image of an object 100cm away is

Similar Questions

A barometer can be used in determining the I. height of a mountain II. depth of a mine III. dew...

The types of motion which a cylindrical drum rolling down an inclined plane undergoes are ...

Which of the following statements is not correct? Isotopes of an element have ...

Which of the following units is equivalent to the watt? ...

The speed of fast-moving neutrons in a nuclear reactor can be reduced by using? ...

The fig above shows a conductor PQ carrying a current I in the direction shown. At a particular posi...

During the nuclear reaction described by 235W →235X→231Y929391 the particles emitted are resp...

A ray of light travels obliquely from a less dense medium to a denser medium. Which of the following...

A constantan wire has a cross sectional area of 4 x 10-8m2 and a resistivity of 1.1 x 10-6$\Omega$...

If a body mass 5kg is thrown vertically upwards with velocity u,at what height will the potential en...