Advertisements
Advertisements
प्रश्न
Moseley's Law for characteristic X-ray is √v = a(Z − b). Here,
विकल्प
both a and b are independent of the material
a is independent but b depends on the material
b is independent but a depends on the material
both a and b depend on the material
Advertisements
उत्तर
both a and b are independent of the material
Moseley's Law for characteristic X-ray is √v = a(Z − b), where, a and b are constants independent of the material used.
APPEARS IN
संबंधित प्रश्न
What role dose infra-red radiation play in physical therapy?
Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs.
(a) 21 cm (wavelength emitted by atomic hydrogen in interstellar space).
(b) 1057 MHz (frequency of radiation arising from two close energy levels in hydrogen; known as Lamb shift).
(c) 2.7 K [temperature associated with the isotropic radiation filling all space-thought to be a relic of the ‘big-bang’ origin of the universe].
(d) 5890 Å - 5896 Å [double lines of sodium]
(e) 14.4 keV [energy of a particular transition in 57Fe nucleus associated with a famous high resolution spectroscopic method (Mössbauer spectroscopy)].
Which radiation is used for satellite communication?
State the approximate range of wavelength associated with the ultraviolet rays.
Give one use of gamma rays.
What are ultraviolet radiations?
An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60 cm.name the medium through which it is travelling
When a Coolidge tube is operated for some time it becomes hot. Where does the heat come from?
Can X-rays be used for photoelectric effect?
Why is exposure to X-rays injurious to health but not exposure to visible light, when both are electromagnetic waves?
50% of the X-ray coming from a Coolidge tube is able to pass through a 0.1 mm thick aluminium foil. The potential difference between the target and the filament is increased. The thickness of the aluminium foil that will allow 50% of the X-ray to pass through will be
To which regions of the electromagnetic spectrum do the following wavelengths belong:
(a) 250 nm
(b) 1500 nm
Calculate the wavelength of a microwave of a frequency of 8.0 GHz.
An e.m. wave exerts pressure on the surface on which it is incident. Justify.
Which of the following is a tool used for separating the different color wavelengths from each other?
All components of the electromagnetic spectrum in a vacuum have the same ______
Arrange the following electromagnetic radiation in the ascending order of their frequencies:
X-rays, microwaves, gamma rays, radio waves
Photons of an electromagnetic radiation has an energy 11 keV each. To which region of electromagnetic spectrum does it belong?
What is the wavelength range of electromagnetic radiation used in radio broadcast?
