Simple Microscope Angular Magnification

Q.

Find the angular magnification in this case. (image at infinity)

1. m=1+D/f

2. m= D/f

3. m=1+f/D

4. m= f/D

Q. For angles of projection of a projectile (45^°- 0) and (45^°+0), the horizontal ranges described by the projectile are in the ratio of :- (1) 1:1 (2) 2:3 (3) 1:2 (4) 2:

Q. For an angular displacement greater than 15 degrees why is it not considered an SHM?

Q.

Magnifying power of a simple microscope is (when final image is formed at D = 25 cm from eye)

[MP PET 1996; BVP 2003]

1. $\frac{D}{f}$
2. $1+\frac{D}{f}$
3. $1+\frac{f}{D}$
4. $1-\frac{D}{f}$

Q. A Galilean telescope has an objective lens of focal length $50\text{cm}$ and eyepiece of focal length $5\text{cm}$. If the telescope is used to focus an object $2\text{m}$ away from the objective lens, what should be the tube length? (Final image is forming at infinity.)

Q. The magnifying power of a microscope can be increased at the cost of strain on the eye.

1. True
2. False

Q.

A LASER is a source of very intense, monochromatic, and unidirectional beam of light. These properties ofa laser light can be exploited to measure long distances. Thedistance of the Moon from the Earth has been already determined veryprecisely using a laser as a source of light. A laser light beamed atthe Moon takes 2.56 s to return after reflection at the Moon’ssurface. How much is the radius of the lunar orbit around the Earth?