A man is looking at a small object placed at his near point. Without altering the position of his eye or the object, he puts a simple microscope of magnifying power $5\text{X}$ before his eyes. The angular magnification achieved is

Q. a man is looking at a small object placed at a near point. Without altering the position of his eye or the object, he puts a simple microscope of magnifying power 5x before his eyes. The angular magnification achieved is
a.) 5
b.) 2.5
c.) 1
d.) 0.2

Q.

Answer the following questions:

(a) The angle subtended at the eye by an object is equal to the angle subtended at the eye by the virtual image produced by a magnifying glass. In what sense then does a magnifying glass provide angular magnification?

(b) In viewing through a magnifying glass, one usually positions one’s eyes very close to the lens. Does angular magnification change if the eye is moved back?

(c) Magnifying power of a simple microscope is inversely proportional to the focal length of the lens. What then stops us from using a convex lens of smaller and smaller focal length and achieving greater and greater magnifying power?

(d) Why must both the objective and the eyepiece of a compound microscope have short focal lengths?

(e) When viewing through a compound microscope, our eyes should be positioned not on the eyepiece but a short distance away from it for best viewing. Why? How much should be that short distance between the eye and eyepiece?

Q. The transverse magnification produced by the objective lens and the angular magnification of the eye-lens of a compound microscope are 25 and 6, respectively. The magnifying power of this microscope is

Q. A child is looking at a distant object. The ciliary muscles of his eye will

Q. An angular magnification of $30\text{X}$ is desired using an eye piece of focal length $5\text{cm}$ and an objective lens. Find the magnifying power of objective lens. [Given angular magnification is achieved in case of normal adjustment]