3 questions · timed · auto-graded
Which of the following statement is incorrect?
The resolving power of telescope is limited by
I. focal length of objective lens
II. the diameter of objective lens
III. the wavelength of light used
IV. the thickness of objective lens
Which of the following statement is incorrect?
I. A Polaroid consist of long-chain molecules aligned in a particular direction.
II. Electric vectors along the direction of the aligned molecule in a polaroid gets absorbed.
III. An unpolarized light wave is incident on polaroid. then it will not get linearly polarised.
Which of the following statement is incorrect?
I. Light diverging from a point source is spherical.
II. Light emerging out of a convex lens when a point source is placed at its focus is plane..
III. the portion of wavefront of light from a distant star intercepted by the earth is plane.