The intensity of illumination at a dista...

The intensity of illumination at a distances of 5 m from a 200 candela source is

`"10 lumens/m"^(2)`

`"24 lumens/m"^(2)`

`"8 lumens/m"^(2)`

`"4 lumens/m"^(2)`

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

MODEL TEST PAPER 3
KCET PREVIOUS YEAR PAPERS|Exercise (PHYSICS)|60 Videos
MODEL TEST PAPER 5
KCET PREVIOUS YEAR PAPERS|Exercise Physics|60 Videos

Similar Questions

Explore conceptually related problems

Unit of intensity of illumination is :

An electric bulb illuminates a plane surface. The intensity of illumination on the surface at a point 2 m away from the bulb 5 xx 10^-4 phot. The line joining the bulb to the point makes an angle of 60^@ with the normal to the surface. Calculate the luminous intensity of bulb.

A passion is listening to a tone of 500 Hz sitting at a distance of 450 M from the source of sound. What is the time interval between successive compression from the source ?

A beam of light is travelling through a room full of smoke. The source of light is also located in the room. The intensity of light (I) and the distance (r) from the source are related as :

About 5% of the power of a 100W bulb is converted to visible radiation. What is the average intensity of visible adiation. At a distance 1 m from the bulb ?

A lamp of 40 cd is used to illuminate a point vertically below it at a distance of 0.5 m. To have the same illumination at that point, distance of 10 cd lamp above the point should be

A metal surface is illuminated by a light of given intensity and frequency to cause photoemission. If the intensity of illumination is reduced to one fourth of its original value, then the maximum kinetic energy of the emitted photoelectrons would become

Two coherrent light sources s_1 and s_2 (lambda = 6000 overset@A) are 1 mm apart from each other. The screen is placed at a distance of 25 cm from the sources. The width of the fringes on the screen should be:

A source of light is placed at a distance of 1 m from a photo cell and the cut off potential is V_0 . If the source of light is placed at a distance of 50 cm, the cut off potential will be :

KCET PREVIOUS YEAR PAPERS-MODEL TEST PAPER 4-PHYSICS

The displacement of partcles in a string streched in the x-direction i...
Text Solution
|
Two sources of sound are in resonance when
Text Solution
|
A transverse wave is described by the equation y= A sin 2 pi (vt - x/l...
Text Solution
|
Define the frequency of an Ac.
Text Solution
|
A tuning fork of frequency 480 Hz produces 10 beats per second when so...
Text Solution
|
A tuning fork of frequency 480 Hz produces 10 beats per second when so...
Text Solution
|
The equation of a transverse wave is given by y=20sinpi(0.02x-2t) wher...
Text Solution
|
The first diffraction minima due to a single slit diffraction is at th...
Text Solution
|
The wavelength of the light of a laser beam can be used as a standard ...
Text Solution
|
Polarisation of light proves the -
Text Solution
|
An electron microscope is superior to an optical microscope in
Text Solution
|
The intensity of illumination at a distances of 5 m from a 200 candela...
Text Solution
|
A simple telescope consisting of an objective of focal length 60 cm an...
Text Solution
|
Two lenses of power +12 and -2 dioptres are placed in contact. The com...
Text Solution
|
A rayt of light passes through an equilateral prism (refrective index ...
Text Solution
|
A body cools from 80^(@)C to 70^(@)C in 6 minutes Under the saame exte...
Text Solution
|
Explain internal energy as a state function.
Text Solution
|
The work done by the string of a simple pendulum during one complete o...
Text Solution
|
A stone released with zero velocity from the top of a water, reaches t...
Text Solution
|
If c and R denote capacity and resistance the dimensions of CR are :
Text Solution
|