Advertisements
Advertisements
प्रश्न
Answer the following.
What is meant by luminous intensity? What is one lumen?
Advertisements
उत्तर
The measurement of the brightness of the light is called luminous intensity.
One lumen is considered to 1 / 1256 th of candle power.
APPEARS IN
संबंधित प्रश्न
Write true or false of the following statement.
Light travels in a straight-line path.
What do we call an electric bulb producing light?
Fill in the blank
Light consists of .............. colours.
Fill in the blank
Speed of light in vacuum is .................
Answer the following.
List four natural sources of light.
When a beam of white light passes through a prism it gets ______.
The mirror used in search light is ______.
a) Draw ray diagrams to show how the image is formed using a concave mirror, when the position of object is:
- at C
- between C and F
- between F and P of the mirror.
b) Mention the position and nature of image in each case.
Observe the picture given in the following figure carefully.
A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?
Look at the figure given in the following figure.
Will there be any difference in the shadow formed on the screen in A and B.
