Question

Magnification products like magnifying glass, compound

microscope, telescope etc., are important instruments for the

daily activities of many individuals today. Whether the

application is for commercial, professional or personal use, a

magnifier enhances one’s ability to perform or enjoy a task or

hobby. A magnifying glass is a convex lens that is used to

produce a magnified image of an object. The magnification of

a magnifying glass depends upon whether it is placed between

the user’s eye and the object being viewed and the total

distance between them. The highest magnifying power is

obtained by putting the lens very close to the eye and moving

the eye and the lens together to obtain the best focus.

i) What is a magnifying glass?

ii) The following shows an experiment to measure the

focal length of a lens. What is the focal length of the

following lens?

iii) On what factors magnification of a magnifying glass

depends?

iv) Draw a diagram showing that the convex lens forms

a virtual, erect, enlarged image of an object​

Answer 1

Answer:

Key Points

The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed and upon the total distance between eye and object.

The magnifying power is the ratio of the sizes of the images formed on the user's retina with and without the lens.

Answer 2

Answer:

EXAM PRACTISE class 10

science (CBSE)

answers

1.a magnify glass is a convex lens i.e used to produce a magnified image of an object

2.according to the diagram Q is the focal length as it is the distance beetween focous and optic center

3.the magnification of magnifying glass depends upon wether it is placed beetween the users eye and the object being viewed and total distance between them.

4. don, t no the answer

thank you