Physics, asked by lswamyanumula, 1 year ago

what is the object distance for convex lens of focal length 20 cm if the size of the image is one third of the object

Anonymous: this question was in yesterday science exam

lswamyanumula: yes

lswamyanumula: but answer is -80 or not is not for sure

ssd20: sure

lswamyanumula: sure it is -80

ssd20: ha baba ha

Answers

Answered by jash280909

It should be around 35 cm

lswamyanumula: how

lswamyanumula: i had written -80 in exam and i am thinking it is correct because u should be negative

ssd20: yes the answer is correct

jash280909: Hmmm

lswamyanumula: and if you get 40 then size of the image is equal to size of the object which is wrong ac to the question

Answered by ssd20

it is the question of yesterday's science paper

lswamyanumula: and post it

ssd20: i forgotten everything but i m trying

lswamyanumula: please

lswamyanumula: did cbse reveal the answer is correct

ssd20: yes offcourse

lswamyanumula: please post the answe

lswamyanumula: answer

ssd20: i dont know

lswamyanumula: but sure na that answer is -80

ssd20: arre ha baba

Previous Question

Next Question