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Identify the constituent radiations of e...

Identify the constituent radiations of electromagnetic spectrum which
(1). Is absorbed by ozone layer in the atmosphere
(2). Is produced by bombarding a metal target by high speed electrons
(3). Is used in satellite communication
(4). has wavelength range between 400 nm to 700 nm.

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(a). Ultraviolet violet rays
(b). X-rays
(c). Microwaves
(d). Visible rays.
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Read the following text and answer the following questions on the basis of the same: Laser: Electromagnetic radiation is a natural phenomenon found in almost all areas of daily life, from radio waves to sunlight to X-rays. Laser radiation - like all light - is also a form of electromagnetic radiation Electromagnetic radiation that has a wavelength between 380 nm and 780 nm is visible to the human eye and is commonly referred to as light. At wavelengths longer than 780 nm, optical radiation is termed infrared (IR) and is invisible to the eye. At wavelengths shorter than 380 nm, optical radiation is termed ultraviolet (UV) and is also invisible to the eye. The term "laser light" refers to a much broader range of the electromagnetic spectrum that just the visible spectrum, anything between 150 nm up to 11000 nm (i.e. from the UV up to the far IR). The term laser is an acronym which stands for "light amplification by stimulated emission of radiation". Einstein explained the stimulated emission. In an atom, electron may move to higher energy level by absorbing a photon. When the electron comes back to the lower energy level it releases the same photon. This is called spontaneous emission. This may also so happen that the excited electron absorbs another photon , releases two photons and returns to the lower energy state. This is known as stimulated emission. Laser emission is therefore a light emission whose energy is used, in lithotripsy, for targeting and ablating the stone inside human body organ. Apart from medical usage, laser is used for optical disk drive, printer, barcode reader etc. What is the range of amplitude of LASER?

Read the following text and answer the following questions on the basis of the same: Laser: Electromagnetic radiation is a natural phenomenon found in almost all areas of daily life, from radio waves to sunlight to X-rays. Laser radiation - like all light - is also a form of electromagnetic radiation Electromagnetic radiation that has a wavelength between 380 nm and 780 nm is visible to the human eye and is commonly referred to as light. At wavelengths longer than 780 nm, optical radiation is termed infrared (IR) and is invisible to the eye. At wavelengths shorter than 380 nm, optical radiation is termed ultraviolet (UV) and is also invisible to the eye. The term "laser light" refers to a much broader range of the electromagnetic spectrum that just the visible spectrum, anything between 150 nm up to 11000 nm (i.e. from the UV up to the far IR). The term laser is an acronym which stands for "light amplification by stimulated emission of radiation". Einstein explained the stimulated emission. In an atom, electron may move to higher energy level by absorbing a photon. When the electron comes back to the lower energy level it releases the same photon. This is called spontaneous emission. This may also so happen that the excited electron absorbs another photon , releases two photons and returns to the lower energy state. This is known as stimulated emission. Laser emission is therefore a light emission whose energy is used, in lithotripsy, for targeting and ablating the stone inside human body organ. Apart from medical usage, laser is used for optical disk drive, printer, barcode reader etc. What is the full form of LASER?

Read the following text and answer the following questions on the basis of the same: Laser: Electromagnetic radiation is a natural phenomenon found in almost all areas of daily life, from radio waves to sunlight to X-rays. Laser radiation - like all light - is also a form of electromagnetic radiation Electromagnetic radiation that has a wavelength between 380 nm and 780 nm is visible to the human eye and is commonly referred to as light. At wavelengths longer than 780 nm, optical radiation is termed infrared (IR) and is invisible to the eye. At wavelengths shorter than 380 nm, optical radiation is termed ultraviolet (UV) and is also invisible to the eye. The term "laser light" refers to a much broader range of the electromagnetic spectrum that just the visible spectrum, anything between 150 nm up to 11000 nm (i.e. from the UV up to the far IR). The term laser is an acronym which stands for "light amplification by stimulated emission of radiation". Einstein explained the stimulated emission. In an atom, electron may move to higher energy level by absorbing a photon. When the electron comes back to the lower energy level it releases the same photon. This is called spontaneous emission. This may also so happen that the excited electron absorbs another photon , releases two photons and returns to the lower energy state. This is known as stimulated emission. Laser emission is therefore a light emission whose energy is used, in lithotripsy, for targeting and ablating the stone inside human body organ. Apart from medical usage, laser is used for optical disk drive, printer, barcode reader etc. Lithotripsy is:

RESONANCE-ELECTRO MAGNETIC WAVES-Exercise 3
  1. Considering the case of a parallel plate capacitor being charged, show...

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  2. Write the mathmatical equation of Ampere-maxwell law.

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  3. Identify the constituent radiations of electromagnetic spectrum which ...

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  4. The displacement current flows in the dielectric of a capacitor when t...

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  5. Which of the following are not electromagnetic waves ?

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  6. if lamda(v'),lamda(x) and lamda(m) represent the wavelengths of visibl...

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  7. The frequency of a light wave in a material is 2xx10^(14)Hz and wavele...

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  8. The electric and magnetic field of an electromagnetic wave is

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  9. The velocity of electromagnetic radiatior in a medium of permittivity ...

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  10. Which of the following statement is false for the properties of electr...

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  11. The electric field on an electromagnetic wave in free space is given b...

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  12. The velocity of all radiowaves in free space is 3xx10^(8),//s, the fre...

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  13. Which of these statement is false:

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  14. Infrared spectrum lies between

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  15. A man can take pictures of those objects which are not fully visible t...

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  16. The electromagnetic radiations are in descending order of wavelength i...

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  17. Maxwell's equations describe the fundamental laws of

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  18. Heat radiations propagate with the speed of

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  19. The curve drawn between velocity and frequency of a photon in vacuum w...

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  20. Which rays are not the portion of electro-magnetic spectrum?

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