Physics, asked by Dakshansh, 1 year ago

one half of a convex lens of focal length 10 cm is covered with a black paper. Draw a ray diagram for an object placed at a distance of 30 cm from such lens.
Also, justify it.

Answers

Answered by pjstyles

the answer is given below in this picture.

Attachments:

pjstyles: plz mark it as brainliest if satisfied.

Dakshansh: if half of the lens is covered with black paper then how can light ray pass through it ?

Dakshansh: i think a ray should be drawn above it...

pjstyles: black paper will not allow proper amount of light to pass for the formation of image because of which image has less brightness and intensity.

Answered by kvnmurty

u = -30 cm f = 10 cm
1/v = 1/f + 1/u = 1/10 - 1/30 = 1/15

v = 15 cm Real inverted image is formed on the other side of the convex lens.

Due to blocking of the lens, half the number of rays that come from the object and go through the lens to form the image do not go to the other end. SO the image formed is only nearly half-as bright as compared to normal situation.

Attachments:

kvnmurty: click on red heart thanks above pls

Previous Question

Next Question

one half of a convex lens of focal length 10 cm is covered with a black paper. Draw a ray diagram for an object placed at a distance of 30 cm from such lens.Also, justify it.

Answers

one half of a convex lens of focal length 10 cm is covered with a black paper. Draw a ray diagram for an object placed at a distance of 30 cm from such lens.
Also, justify it.