English

Answer the Following. What is Meant by Luminous Intensity? What is One Lumen?

Advertisements
Advertisements

Question

Answer the following.

What is meant by luminous intensity? What is one lumen?

Short/Brief Note
Advertisements

Solution

The measurement of the brightness of the light is called luminous intensity.
One lumen is considered to 1 / 1256 th of candle power.

shaalaa.com
  Is there an error in this question or solution?
Chapter 5: Light - Exercises 5

APPEARS IN

RELATED QUESTIONS

Match the following

(a). A light ray passes             from air to glass  (1) . speeds up 
(b). A light ray passes             from glass to water   (2). reflects red light 
(c). Virtual image  (3). primary colours 
(d). Red rose  (4). plane mirror 
(e). Red, green, and               blue (5). slows down 

Fill in the blank

A medium through which light cannot pass is called the ....................


From among the following objects, list out the opaque, translucent, and transparent bodies in the space provided below:
A glass strip, an ordinary paper, greased paper, tracing paper, polythene sheet, wooden piece, steel plate, glycerine, kerosene oil, mustard oil, grounded glass, stone, book, water, and milk.
Opaque Transparent Translucent


Write true or false

Opaque objects do not allow light to pass through them.


Answer the following.

Differentiate between luminous and non-Luminous objects.


_______ is the natural source that stimulates sight and makes things visible.


State whether true or false. If false, correct the statement.

If a ray of light passes obliquely from one medium to another, it does not suffer any deviation.


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?


A student observes a tree given in the following figure through a pin hole camera. Which of the diagrams given in the following figure (a) to (d), depicts the image seen by her correctly?


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.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×