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प्रश्न
Choose the correct option.
Earth’s atmosphere is richest in
विकल्प
UV
IR
X-ray
Microwaves
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उत्तर
Earth’s atmosphere is richest in IR
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संबंधित प्रश्न
Name the parts of the electromagnetic spectrum which is
used to treat muscular strain.
Write in brief, how these waves can be produced.
What is the range of the wavelength of the following electromagnetic waves?
(a) Micro waves .
Name the region beyond the violet end of the spectrum called.
Can a hydrogen atom emit characteristic X-rays?
The X-ray coming from a Coolidge tube has a cutoff wavelength of 80 pm. Find the kinetic energy of the electrons hitting the target.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
The electric current in an X-ray tube (from the target to the filament) operating at 40 kV is 10 mA. Assume that on an average, 1% of the total kinetic energy of the electron hitting hte target are converted into X-rays.
(a) What is the total power emitted as X-rays and (b) how much heat is produced in the target every second?
The wavelengths of Kα and Lα X-rays of a material are 21.3 pm and 141 pm respectively. Find the wavelength of Kβ X-ray of the material.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
The energy of a silver atom with a vacancy in K shell is 25.31 keV, in L shell is 3.56 keV and in M shell is 0.530 keV higher than the energy of the atom with no vacancy. Find the frequency of Kα, Kβ and Lα X-rays of silver.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Name the radiation which can be detected by thermopile.
Name the part of the electromagnetic spectrum which is:
Produced by bombarding a metal target with high electrons.
Calculate the shortest wavelength of electromagnetic radiation present in Balmer series of hydrogen spectrum.
How will you investigate the existence of the radiation beyond the red and violet extremes of the spectrum?
State three properties of ultra-violet radiation similar to visible light.
Give one use of electromagnetic radiation in Ultraviolet radiation.
Answer briefly.
Does an ordinary electric lamp emit EM waves?
If the Earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
Light of wavelength `3500A` is incident on two metals A and B whose work functions are 3.2 eV and 1.9 eV respectively. Which metal will emit photoelectrons?
Following QN ∴ 14, the radiation force on the roof will be
What is time period of the light for which the eye is most sensitive?
One requires 11eV of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in ______.
Given below in the left column are different modes of communication using the kinds of waves given in the right column.
| A. | Optical Fibre Communication |
P. | Ultrasound |
| B. | Radar | Q. | Infrared Light |
| C. | Sonar | R. | Microwaves |
| D. | Mobile Phones | S. | Radio Waves |
From the options given below, find the most appropriate match between entries in the left and the right column.
Which one of the following electromagnetic radiation has the least wavelength?
What is the nature of all electromagnetic waves?
Which relation connects the speed of light in vacuum, frequency, and wavelength?
Which radiation has the longest wavelength and lowest frequency in the electromagnetic spectrum?
Which description identifies how radio waves are mainly produced?
How does the frequency of infrared radiation compare with that of microwaves?
Which set consists of applications of infrared radiation?
