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Why sky appears blue in earth atmosphere and black in outer space

Posted by Ranbir Bambr 8 years, 1 month ago

1 answers

Ramesh Kumar 8 years, 1 month ago

Because in earth atmosphere the water n particles of pollution r present by this the sun rays r directly come at particle n due to this frequency of color it reflect blue n in space particle r not present so wave not able to strike at anywhere I think so.........

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please explain Ac current chapter

Posted by Vijay Kumalta 8 years, 1 month ago

CBSE > Class 12 > Physics

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Relation between drift velocity and current

Posted by Shivam Thakur 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Pooja Singh 8 years, 1 month ago

I=ΔQ/Δt =neAvd

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How many derivations in board exam

Posted by Vikas Kumar 8 years, 1 month ago

CBSE > Class 12 > Physics

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What is the weighteage of derivations in board exam

Posted by Vikas Kumar 8 years, 1 month ago

CBSE > Class 12 > Physics

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In physics which part is easy. Pls reply

Posted by Divya Kumari 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Sourava Panda 8 years, 1 month ago

2nd part

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A car moving along a straight highway with speed of 126km h-1 is brought to a stop within a distance of 200m what is the retardation of the car (assumed uniform )and how long does it take for the car to stop

Posted by Shubham Singh Rathore 8 years, 1 month ago

CBSE > Class 12 > Physics

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Investigatory project

Posted by Mohit Dudi 8 years, 1 month ago

CBSE > Class 12 > Physics

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some important topics of wave optics

Posted by Ashutosh Kashyap 8 years, 1 month ago

CBSE > Class 12 > Physics

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Which book is good for numericals practice for boards

Posted by Akash Ranot 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Sri Krishna 8 years, 1 month ago

Oswaal and pradeep

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What is dipole movement?

Posted by Prem Raj 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Upendra Ponia 8 years, 1 month ago

Two charge are equal and opposite and make difference R is situated at a point is known as dipole momemt

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Derive electric field along equatorial line of an electric dipole

Posted by Sundar Singh 8 years, 1 month ago

CBSE > Class 12 > Physics

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What is causing junction

Posted by Imran Ahmed 8 years, 1 month ago

CBSE > Class 12 > Physics

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How many derivations comes in board exam And what are this

Posted by Vikas Kumar 8 years, 1 month ago

CBSE > Class 12 > Physics

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State Gauss theorem and apply it to find the electric field at a point due to (a) a line of charge (b) A plane sheet of charge (c) A Charged spherical conducting shell?

Posted by Sahil Gadhwal 8 years, 1 month ago

CBSE > Class 12 > Physics

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Derive an expression for the energy stored in a capacitor. Show that whenever two conductors share charges by bringing them into electrical contact, there is a loss of energy?

Posted by Sahil Gadhwal 8 years, 1 month ago

CBSE > Class 12 > Physics

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What is polarisation Of light

Posted by Sarthak Shrivastav 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Meetesh Dwivedi 8 years, 1 month ago

When unarranged light (unpolarised) converts into arranged light(polarised) is known as polarisation.

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An uncharged insulated conductor A is brought near a charged insulated conductor B . What happens to charge and potential of B

Posted by Naman Katiyar 8 years, 1 month ago

CBSE > Class 12 > Physics

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Topics for project

Posted by Komal Sah 8 years, 1 month ago

CBSE > Class 12 > Physics

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Derive a relation between current and drift velocity of electrons in a conductor.

Posted by Shivam Panchal 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Naman Katiyar 8 years, 1 month ago

Bbgff

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What is the resolving power of telescope ..?

Posted by Pushpendra Chhonker 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Amar Kumar 8 years, 1 month ago

Resolving power is defined as the ability of a microscope or telescope to distinguish two close together images as being separate. An example of resolving power is how well a telescope can show two stars as being separate stars.

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What is photons

Posted by Pushpendra Chhonker 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Amar Kumar 8 years, 1 month ago

Photons: a particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.

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You have tricks to learn or know the concept of class 12th physics book

Posted by Nitesh Vats 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Ramesh Kumar 8 years, 1 month ago

Make a list of all important formula special basic then list out previous year basic formula and read this carefully

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Pushpendra Chhonker 8 years, 1 month ago

Read daily ...

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Why modulation index is less than 1

Posted by Gagan Preet 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Amar Kumar 8 years, 1 month ago

Modulation index(m) is basically the ratio of peak voltage of modulating signal and peak voltage of carrier signal and amplitude modulation could be thought of as superimposition of modulations signal on the carrier. So when m is greater than one, over-modulation occurs and the modulating signal being of greater amplitude,part of its information is lost in the process of modulation which is undesirable. The resulting waveform looks like below, the gaps indicating part of modulating signal that is lost.So modulation index is less than one.

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If any body is in motion it's mass is more then why fatal person have more mass

Posted by Smiriti Pandey 8 years, 1 month ago

CBSE > Class 12 > Physics

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What is mean by sperical aberration in spherical mirror

Posted by Gandhi Rajan 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Soumya Sakshi 8 years, 1 month ago

Spherical abberation is a case occuring in spherical mirror in in which focus is not precisely defined and thus difficulty arises in image formation

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Difference between amplitude modulated and frequency modulated waves by drawing suitable diagram

Posted by Hari Shanker 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 6 months ago

The main difference between both modulations is that in frequency modulation, the frequency of the carrier wave is modified as per the transmit data, while in amplitude modulation, the carrier wave is modified according to the data.

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Which part of human eye donate after death

Posted by Mohd Shoaib 8 years, 1 month ago

CBSE > Class 12 > Physics