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2 sources of light which emit the light wave having the same frequency or same wavelength nd a zero phase differece or constant phase diff. for e.g. * 2 images of single source * the source nd its image also act as coherent source

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Why prism is used in many optical instruments?

Posted by Shivani .. 7 years ago

CBSE > Class 12 > Physics

1 answers

Nikhil Singh 7 years ago

Because it has ability to disperse light

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Raman effect

Posted by Abhi Kesar 7 years ago

CBSE > Class 12 > Physics

1 answers

Manish Yadav 7 years ago

Its same like dispersion and other optical effects it make u know why water is blue ,sky is blue......etc

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if an electron makes a transition from an energy level-0..85 eV to -3.4eV . Calculate the wavelength of the spectral line emitted.

Posted by Vineet Agarwal 7 years ago

CBSE > Class 12 > Physics

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Why photoelectric effect cannot be explained on the basis of wave nature of light? Give reasons

Posted by Khelan Singh 7 years ago

CBSE > Class 12 > Physics

2 answers

Yogita Ingle 7 years ago

Wave theory of light cannot explain the photoelectric effect because of the following reasons:
i) Wave nature does not explain the instantaneous ejection of photoelectrons.
ii) It does not explain to us the threshold frequency for a metal surface.
iii) Wave nature do not tell us, why kinetic energy of the emitted electrons is independent of the intensity of light and depends upon its frequency.
Basic features of photon picture of electromagnetic radiation on which Einstein’s photoelectric equation is based upon is:

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Shivam Kumar 5 years, 8 months ago

How are you photoelectric effect

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Linear magnification in terms of uf & vf

Posted by Jignesh Jain 7 years ago

CBSE > Class 12 > Physics

0 answers

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Which all portions from the physics ncert has been exempted for boards...??

Posted by Srivinayak V 7 years ago

CBSE > Class 12 > Physics

2 answers

Srivinayak V 7 years ago

Which topics from ray optics too?

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Nitika Neb 7 years ago

Vande graff generator ch Ac

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If the ratio of horizontal components of earth's magnetic field to the resultant magnetic field at a place is 1/√2 what is the angle of dip at that place?

Posted by Khelan Singh 7 years ago

CBSE > Class 12 > Physics

1 answers

Nitin Yadav 7 years ago

45°

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A wire of 15 ohm resistance is gradually stretched to double it's original length.It is then connect in parallel across a 3v battery. Find the current drawn from the battery

Posted by Wali Baaese 7 years ago

CBSE > Class 12 > Physics

2 answers

Nitin Yadav 7 years ago

3/15 or 0.2

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Rajat Dhull 7 years ago

1/20 or 0.05A

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Sharpness of resonance

Posted by Labees Khan 7 years ago

CBSE > Class 12 > Physics

1 answers

Vijayalakshmi P 7 years ago

Quality factor 1/R × underroot L/C

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Does the charge given to a mettalic sphere depends on whether it is hollow or solid ? Give reason for your answer .

Posted by Arti Vishwakarma 7 years ago

CBSE > Class 12 > Physics

4 answers

Nitin Yadav 7 years ago

No because total charge resides on the surface of sphere

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Arti Vishwakarma 7 years ago

Your answer is wrong Shubham Sharma

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Arti Vishwakarma 7 years ago

No , you are wrong

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Shubham Sharma 7 years ago

Yes

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What dispersion light

Posted by Prashant Rana 7 years ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 7 years ago

When white light is passed through a glass prism it splits into its spectrum of colors (in order violet, indigo, blue, green, yellow, orange and red) and this process of white light splitting into its constituent colors is termed as dispersion. The splitting of white light into its constituent colors in the sequence of VIBGYOR, on passing through a prism is called dispersion of light.

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Physics sample paper latest .

Posted by Shivani .. 7 years ago

CBSE > Class 12 > Physics