CBSE Class 10 Sample Paper Science Solution - For 2023 Boards

CBSE Class 10 Sample Paper for 2022 Boards [Term 2] - Science Solution →
Class 10
Solutions to CBSE Sample Paper - Science Class 10

Question 39 (c) - Choice 1 [Case Based] - CBSE Class 10 Sample Paper Science Solution - For 2023 Boards - Solutions to CBSE Sample Paper - Science Class 10

Last updated at April 16, 2024 by

A slide projector has a convex lens with a focal length of 20 cm. The slide is placed upside down 21 cm from the lens. How far away should the screen be placed from the slide projector’s lens so that the slide is in focus?

 

Answer:

1/f= 1/v- 1/u

1/20 = 1/v- 1/-20

1/v = 1/20 - 1/21

= (21 - 20)/420

= 1/420

v= 420 cm

Go Ad-free
Maninder Singh's photo - Co-founder, Teachoo

Made by

Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo