Click to Chat

0120-4616500

CART 0

• 0

MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

• Complete Physics Course - Class 11
• OFFERED PRICE: R 2,800
• View Details
Get extra R 700 off
USE CODE: SSPD25

```				   explain  solid angle in detail ?
```

5 years ago

Share

### Answers : (1)

```										Dear singh,
The solid angle, Ω, is the two-dimensional angle in three-dimensional space that an object subtends at a point. It is a measure of how large that object appears to an  observer looking from that point. A small object nearby may subtend the  same solid angle as a larger object farther away (for example, the  small/near Moon can totally eclipse the large/remote Sun because, as  observed from a point on the Earth, both objects fill almost exactly the  same amount of sky). An object's solid angle is equal to the area of the segment of unit sphere (centered at the vertex of the angle) restricted by the object (this definition works in any  dimension, including 1D and 2D). A solid angle equals the area of a  segment of unit sphere in the same way a planar angle equals the length of an arc of unit circle.

The units of solid angle can be called steradian (abbreviated "sr") according to SI.  From the point of view of mathematics and physics solid angle is  dimensionless and has no units, thus "sr" might be skipped in scientific  texts. The solid angle of a sphere measured from a point in its  interior is 4π sr, and the solid angle subtended at the center of a cube by one of its  faces is one-sixth of that, or 2π/3 sr. Solid angles can also be  measured in square degrees (1 sr = (180/π)2 square degree) or in fractions of the sphere (i.e., fractional area), 1 sr = 1/4π fractional area.
One way to determine the fractional area subtended by a spherical  surface is to divide the area of that surface by the entire surface area  of the sphere. The fractional area can then be converted to steradian  or square degree measurements by the following formulae:

To obtain the solid angle in steradians, multiply the fractional area by 4π.
To obtain the solid angle in square degrees, multiply the fractional area by 4π × (180/π)2, which is equal to 129600/π.

Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.
All the best.
Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Suryakanth –IITB

```
5 years ago

# Other Related Questions on Electrostatics

64 identical drops of mercury are charged simultaneously to the same potential of 10 volt. assuming that the drops to be spherical, if all the charged drops are made to combine to form one...

64*(4/3 pi r^3) = (4/3 pi R^3) R = 4r Potential of bigger sphere, k64q/R => 16(kq/r) = >16*10 = 160 volt.

 Vikas TU 2 months ago
a charged particle of mass 2 mg remains freely in air in an elecrric field of strength 4 N/C directed upward. calculate the charge and determine its nature (g=10m/ s 2 )

The given electric field should exert an upward force on the particle so that it cancels the gravitational force which acts on the particle in the downward direction. Since the electric...

 Raman Mishra one month ago
There is a cube of side a at every corners of which equal charge (say, q) is placed. Find the force acting on any one of the charges?

you’d have to find the forces between the charge and it’s surrounding charges at different positions, and then calculate their vector sum.

 Neeti one year ago

is it 4*3 1/2 kq 2 /a 2 ???

 Deepti Gupta one year ago

CALCULATE THAT.....!

 Prince Sharma one year ago
i am not understanding physics concepts so i want to take care about physics so u plzz sugguest mee

“This post has been due since long, as many students and parents have been requesting me to say something about the general ‘study’ strategy for building one’s career...

 Saurabh Kumar 4 months ago

@ srinu I agree with your point that physics is a scaring subject , but if you will give good approach , absolutely u can be the best .. What u ahve to do is the following 1- FOLLOW...

 Umakant biswal 4 months ago
WHAT IS THE DEFINITION OF RESOSNANCE.................?

DEAR SREE, RESONANCE DESCRIBES WHEN A VIBRATING SYSTEM OR EXTERNAL FORCE DRIVES ANOTHER SYSTEM TO OSCILLATE WITH GREATER AMPLITUDE AT SPECIFIC PREPERENTIAL FREQUENCY.

 SAI SARDAR 3 months ago

@ sree when a vibrating system or external force drives another system to oscillate with greater amplitude at a specific preferential frequency. the condition is called as resonance . IT...

 Umakant biswal 3 months ago
How to find magnetic declination in a practical way???(without using any previous recorded magnetic declination values)

Magnetic declination or variation is the angle on the horizontal plane between magnetic north (the direction the north end of a compass needle points, corresponding to the direction of the...

 Umakant biswal one month ago

But if we place magnetic compass then we can only know the magnetic north. We cannot find true north in the magnetic compass

 Kothakonda Maharshi one month ago
View all Questions »

• Complete Physics Course - Class 12
• OFFERED PRICE: R 2,600
• View Details
Get extra R 650 off
USE CODE: SSPD25

• Complete Physics Course - Class 11
• OFFERED PRICE: R 2,800
• View Details

Get extra R 700 off
USE CODE: SSPD25

More Questions On Electrostatics