Advertisements
Advertisements
प्रश्न
Frequencies of Kα X-rays of different materials are measured. Which one of the graphs in the figure may represent the relation between the frequency v and the atomic number Z ?
Advertisements
उत्तर
Using Moseley's Law,
`sqrt(v) = a(Z - b)`,
where v = frequency of Kα X-ray
Z = atomic number
`therefore v = a^2(Z - b)^2`
⇒ `(Z - b)^2 = v/a^2`
This is the equation of a parabola with some intercept on the axis, representing atomic number (Z). Hence, curve d represent this relation correctly.
APPEARS IN
संबंधित प्रश्न
What role dose infra-red radiation play in maintain the Earth’s warmth
Identify the part of the electromagnetic spectrum which is suitable for radar system used in aircraft navigation.
A radio can tune in to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wavelength band?
If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now?
(a) Give a list of at least five radiations, in order of their increasing frequencies, which make up the complete electromagnetic spectrum.
(b) Which of the radiation mentioned by you in part (a) has the highest penetrating power.
What is the range of the wavelength of the following electromagnetic waves?
(a) Infrared.
Name the radiations of wavelength just longer than 8 × 10-7m.
The electron beam in a colour TV is accelerated through 32 kV and then strikes the screen. What is the wavelength of the most energetic X-ray photon?
(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 radiation of the electromagnetic spectrum which is used for the following:
To photograph internal parts of the human body and Give the frequency range
Name two sources of ultraviolet radiation.
State three properties of ultra-violet radiation similar to visible light.
Photons of an electromagnetic radiation has an energy 11 keV each. To which region of electromagnetic spectrum does it belong?
Give any two uses of infrared waves.
Name the electromagnetic radiation whose frequency is 10 Hz.
Name the electromagnetic radiation that has been used in obtaining the image below.
Name two electromagnetic waves of wavelength smaller than that of violet light.
What is called the invisible spectrum?
Which set lists applications of X-rays?
