Home
Class 12
PHYSICS
An electric bulb is hanging over a table...

An electric bulb is hanging over a table at a height of 1 m above it. The illuminance on the table directly below the bulb is 40 lux. The illuminance at a point on the table 1 m away from the first point will be about

A

10 lux

B

14 lux

C

20 lux

D

28 lux

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • PHOTOMETRY

    HC VERMA|Exercise Objective 2|4 Videos

  • PHOTOMETRY

    HC VERMA|Exercise Exercises|16 Videos

  • PHOTOMETRY

    HC VERMA|Exercise Short Answer|8 Videos

  • PHOTO ELECTRIC EFFECT AND WAVE PARTICLE DUALITY

    HC VERMA|Exercise Exercise|2 Videos

  • SEMICONDUCTOR AND SEMICONDUCTOR DEVICES

    HC VERMA|Exercise exercises|35 Videos