EASY
Earn 100
When a metal of atomic number is used as the target in a Coolidge tube. Let be the frequency of the line. Corresponding values of and are known for a number of metals. Which of the following plots will give a straight line?
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Important Questions on Bohr Model, X-ray Spectra, Wave-Particle Duality
EASY
An X-ray tube is operated at million volt. The shortest wavelength of the produced photon will be:
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Electrons of mass, with de-Broglie wavelength, fall on the target in an X-ray tube. The cutoff wavelength, of the emitted X-ray is
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W. K. Roentgen discovered
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The shortest wavelength of -rays emitted from an -ray tube depends upon
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The frequency of line of a source of atomic number is proportional to
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Which wave or ray is produced due to decelerating or accelerating charged particles?
MEDIUM
An electron beam is accelerated by a potential difference to hit a metallic target to produce rays. It produces continuous as well as characteristic rays. If is the smallest possible wavelength of ray in the spectrum, the variation of with is correctly represented in :
MEDIUM
How are the characteristic x-rays spectrum formed?
HARD
The X-ray of molybdenum has wavelength . If the energy of a molybdenum atom with a electron knocked out is , the energy of this atom when an electron is knocked out will be . (Round off to the nearest integer )
MEDIUM
In a diffraction pattern due to a single slit of width , the first minimum is observed at an angle when light of wavelength is incident on the slit. The first secondary maximum is observed at an angle of
EASY
The waves emitted when a metal target is bombarded with high energy electrons are
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The luminous border that surrounds the profile of a mountain just before sun rises behind it, is an example of
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In an -ray tube, electrons emitted from a filament (cathode) carrying current hit a target (anode) at a distance from the cathode. The target is kept at a potential higher than the cathode resulting in emission of continuous and characteristic X-rays. If the filament current is decreased to the potential difference is increased to and the separation distance is reduced to then
EASY
Wavelength of characteristic X-ray depends on which property of target?
EASY
The Bragg’s equation has no solution for
MEDIUM
If radiation of has a wavelength , then the wavelength of the corresponding radiation of is
HARD
A student is jogging on a straight path with the speed per hour. Perpendicular to the path is kept a pipe with its opening from the road (see figure). Diameter of the pipe is At the other end of the pipe is a speaker emitting sound of towards the opening of the pipes. As the student passes in front of the pipe, she hears the speaker sound for seconds. is in the range (take speed of sound, ):
MEDIUM
If is the wavelength of ray line of copper (atomic number ) and is the wavelength of the ray line of molybdenum (atomic number ), then the ratio is close to
EASY
X-ray of wavelength is emitted from the metal target. The potential difference applied across the cathode and the metal target is
EASY
Wave property of electrons implies that they will show diffraction effects. Davisson and Germer demonstrated this by diffracting electrons from crystals. The law governing the diffraction from a crystal is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively (see figure).
If a strong diffraction peak is observed when electrons are incident at an angle from the normal to the crystal planes with distance between them (see figure), de Broglie wavelength of electrons can be calculated by the relationship ( is integer)
