Question

write the experiment of image formed by convex lense​

Answer 1

Answer:

Theory

What is a convex lens?

A convex lens is defined as a lens which is thick at the centre and thin at the edges. A convex lens is also known as a converging lens as it converges the light beam incident on it. There are three types of convex lens:

Double convex lens

Plano-convex lens

Concavo-convex lens

What is lens formula?

Lens formula is defined as the relationship between object distance (u), image-distance (v) and the focal length (f). Following is the mathematical representation of lens formula:

$1f \: = \: 1v - 1u$

Where,

f is the focal length of the lens

v is the distance of the image from the optical centre of the lens

u is the distance of an object from the optical centre of the lens

Materials Required

Following are the materials required for the experiment:

A convex lens with a focal length of 12-20 cm.

Measuring scale

Optical bench

A needle

A candle

Procedure

Place the convex lens on a lens holder, placing the screen on the other side of the lens.

Try focusing the image to get a sharp, clear and inverted image on the screen. The focal length that is obtained is a rough focal length which can be measured using a meter scale.

The position at which the lens is fixed, mark it as O.

Once the focal length is calculated, mark point F on both the sides of the lens.

Mark a point 2F, as the distance between the lens is double the focal length of the lens.

Place the candle at a distance beyond 2F and adjust the height of the centre of the lens with the height of the flame.

To obtain a sharp image of the candle flame in the convex lens, adjust the position of the screen and record the observations.

Record the observations by placing the needle or lighted candle at 2F.

Record the observations by shifting the object between F and 2F.

Record the observations by placing the object at F.

Record the observations by placing the object between O and F.

Explanation:

please like.