Which of the following are true regarding image formation with the help of mirrors?
I. A concave mirror can give a diminished virtual image.
II. A concave mirror can give a real image.
III. A convex mirror can give a virtual image.
IV. A convex mirror cannot give a real image.
Select the correct answer from the options given below.
Important Questions on Optics
. Power of lens: diopter
. Two waves of same frequency: diffraction and amplitude having constant phase difference
. Total internal reflection: optical fibre
. Change of focal length of a lens with colour: spherical aberration
Consider the following statement(s):
$\mathrm{I}$. Compound microscope has an objective lens with a very short focal length.
$\mathrm{II}$. Simple microscope is of a strong converging lens system.
$\mathrm{III}$. Television camera converts the optical image into electrical video signals.
$\mathrm{IV}$. Hypermetropia is corrected by using a diverging lens.
Which of the statement(s) given above is/are correct?
Consider the following statement(s):
$\mathrm{I}$. The focal length of the objective of a microscope is less than the focal length of the eyepiece.
$\mathrm{II}$. The minimum distance between an object and its real image formed by a convex lens of focal length is equal to .
Which of the statement(s) given above is/are correct?
Statement $\mathrm{I}$: Convex mirror is used as a driver mirror.
Statement $\mathrm{II}$: Images formed by a convex mirror are diminished in size.
To obtain the powerful parallel beams of light from a vehicle's headlight, one must use,
A refracting telescope consists of
