What is magnification?

What is Bio-magnification?

If the object is at (50/7)cm and the image produced is at distinct vision. What is the magnification in this case ?

What is meant by magnification? Write its expression. What is its sign for real image and virtual image?

A card sheet divided into squares each of size 1 mm^(3) viewed at a distance of 9 cm through a magnifying glass (a converging lens of focal length 9 cm ) held close to the eye. a. What is the magnification produced by lenas ? How much is the area of each square in the virtual image ? b. What is the angular magnification (magnifying power ) of the lens ? c. Is the magnification in (a) equal to the magnifying power in (b)? explain.

A small telescope has an objective lens of focal length 125 cm and an eyepiece of focal length 2 cm. What is the magnification of the telescope? What is the separation between the objective and eyepiece? Two stars separated by 1' will appear at what separation when viewed through the telescope?

A slide projector produces 500 times enlarged image of a slide on a screen 10 m away. Assume that the projector consists of a single convex lens used for magnification. If the screen is moved 2.0 m closer, by what distance should the slide be moved towards or away from the lens so that the image remains focused on the screen ? What is the magnification in this case ?

Derive the equation for thin lens and obtain its magnification .