Description : de Broglie’s relation for matter waves was experimentally verified by: a) Davisson b) Germer c) G.P. Thomson d) All the these
Last Answer : c) G.P. Thomson
Description : The concept that particles can behave like waves was given by a) Compton b) De-Broglie c) G.P. Thomson d) Germer
Last Answer : b) De-Broglie
Description : The wave nature of electrons was EXPERIMENTALLY verified by: w) Einstein x) Davisson and Germer y) Balmer z) Bohr.
Last Answer : ANSWER: X -- DAVISSON AND GERMER
Description : Which one of the following scientists regarded light as electromagnetic waves? a) Newton b) Galileo c) de Broglie d) Maxwell
Last Answer : d) Maxwell
Description : Who hypothesized that it would be impossible to know the exact location and exact momentum of a particle at the same time? Was it: w) Heisenberg x) De Broglie y) Planck z) Schrodinger
Last Answer : ANSWER: A -- HEISENBERG
Description : Davisson and Germer scattered electrons from a crystal of nickel. The scattered electrons formed a strong diffraction pattern. What important conclusion was drawn from this experiment?
Last Answer : ANSWER: ELECTRONS ACTED LIKE WAVES
Description : Noble prize was awarded to De-Broglie for his work on particle nature of light in a) 1929 b) 1937 c) 1905 d) 1915
Last Answer : a) 1929
Description : Uncertainty principle was presented by a) Dirac b)De Broglie c) Shrodinger d) W. Heisenberg
Last Answer : d) W. Heisenberg
Description : Matter waves are – (1) de Broglie waves (2) Electromagnetic waves (3) Transverse waves (4) Longitudinal waves
Last Answer : (1) de Broglie waves Explanation: In mechanics, matter waves or de Broglie waves reflects the wave-particle duality of matter. The de Broglie relations show that the wavelength is inversely proportional to the momentum of a particle and is also called de Broglie wavelength.
Description : Matter waves are (1) de Broglie waves (2) Electromagnetic waves (3) Transverse waves (4) Longitudinal waves
Last Answer : de Broglie waves
Description : Which of the following scientists hypothesized that it would be possible for particles to have wave-like properties ? Was it: w) Planck x) Heisenberg y) Einstein z) de Broglie
Last Answer : ANSWER: Z -- DE BROGLIE
Description : The presence of anti-matter was predicted by a) P.A.M Dirac b) Anderson c) Einstein d) Chamberlain
Last Answer : a) P.A.M Dirac
Description : The concept of electric field theory was introduced by: (a) Kepler (b) Newton (c) Dalton (d) Michael Faraday
Last Answer : (d) Michael Faraday
Description : Photoelectric effect was discovered by a) Einstein b) G.P.Thomson c) Hallwachs d) Lenard
Last Answer : a) Einstein
Description : First super conductor was discovered by a) Kelvin b) Hertz c)Einstein d) Kamerlingh Ornes
Last Answer : d) Kamerlingh Ornes
Description : Answer: Victor de Broglie.
Last Answer : What do you mean by orbitals?
Description : The de-Broglie wavelength of an electron moving in the nth Bohr orbit of radius ris given by
Last Answer : The de-Broglie wavelength of an electron moving in the nth Bohr orbit of radius ris given by A. `(2pir)/n` B. `npir` C. `(nr)/(2pi)` D. `(nr)/pi`
Description : If kinetic energy of a proton is increased nine times the wavelength of the de - Broglie wave associated with it would become :-
Last Answer : If kinetic energy of a proton is increased nine times the wavelength of the de - Broglie wave associated with it ... (3)` times D. `(1)/(9)` times
Description : The two paricles A and B have de Broglie wavelengths 1 nm and 5 nm respectively if mass of A is four times the mass of B, the ratio of kinetic energie
Last Answer : The two paricles A and B have de Broglie wavelengths 1 nm and 5 nm respectively if mass of A is four times the mass of ... : 4` C. `20 : 1` D. `5 : 4`
Description : If the total energy of an electron in a hydrogen atom in an exicted state is -3.4 eV , then the de- broglie wavelegth of the electron is :-
Last Answer : If the total energy of an electron in a hydrogen atom in an exicted state is -3.4 eV , then the de- broglie ... `5xx10^(-9)m` D. `9.3xx10^(-12)m`
Description : An electron , in a hydrogen-like atom, is in excited state. It has a total energy of -3.4 eV. Calculate (a) the kinetic energy and (b) the de Broglie
Last Answer : An electron , in a hydrogen-like atom, is in excited state. It has a total energy of -3.4 ... and (b) the de Broglie wavelength of the electron.
Description : De Broglie equation is (a) h/mv = 1 (b) E1 – E2 = hv (c) C = 1v (d) n1 = 2d sin q
Last Answer : Ans:(a)
Description : The de Broglie equation is (a) h/mv = 1 (b) hv = E2 - E1 (c) n 1 = 2d sin (d) c = hv
Description : Bohr's theory of fixed orbits contradicts (a) Coulomb's law (b) Planck's theory (c) de Broglie relation (d) Uncertainty principle
Last Answer : Ans:(d)
Description : Who proposed first atomic theory? (1) E.Rutherford (2) De Broglie (3) John Dalton (4) D.I.Mendeleef
Last Answer : (3) John Dalton Explanation: Democritus first suggested the existence of the atom but it took almost two millennia before the atom was placed on a solid foothold as a fundamental chemical object by John Dalton (1766-1844).
Description : Who proposed first atomic theory? (1) E. Rutherford (2) De Broglie (3) John Dalton (4) D. I. Mendeleev
Description : First Atomic theory was proposed by? A. John Dalton (Answer) B. E.Rutherford C. De Broglie D. D.I.Mendeleef
Last Answer : A. John Dalton (Answer)
Description : here are two types of diffraction Fresnel and __________. A. Michelson B. De Broglie C. Fraunhofer D. Huygens
Last Answer : C. Fraunhofer
Description : 12.The plant in which Hugo de Vries introduced the concept of mutation (a)Oenothera lamarckiana (b)Pisum sativum (c)Allium cepa (d)Mirabilis jalapa
Last Answer : ANS.(A) Oenothera lamarckiana
Description : Why should a resistance be introduced in a circuit in series deliberately? a. to increase current b. to decrease current c. to control current d. just to give a good look to circuit
Last Answer : b. to decrease current
Description : .Diffractionof electromagneticwaves a. is caused by reflections from the ground b. arises only with spherical wavefronts c. will occur when the waves pass through a large slot d.may occuraroundthe edge of asharpobstacle
Last Answer : d.may occuraroundthe edge of asharpobstacle
Description : The absorption ofradiowaves bythe atmosphere depends on a. their frequency b. their distance from the transmitter c. the polarization of the waves d. the polarization of the atmosphere
Last Answer : a. their frequency
Description : .In electromagneticwaves,polarization a. is caused by reflection b.isdue to the transversenature ofthewaves c. results from the longitudinal nature of the waves d. is always vertical in an isotropic medium
Last Answer : b.isdue to the transversenature ofthewaves
Description : FrequenciesintheUHFrange normallypropagate bymeans of a. ground waves b. sky waves c. surface waves d.spacewaves
Last Answer : d.spacewaves
Description : By the transition of inner shell electrons in heavy atoms, high energy photons are emitted which are a) gamma rays b) X-rays c) radio waves d) photon rays
Last Answer : b) X-rays
Description : Light waves can cause photoelectric emission in a) Metals b) Alkali metals c) Insulators d) None of the above
Last Answer : c) Insulators
Description : Which one of the following radiations has the most energetic photon? a) T.V. waves b) Micro waves c) X-rays d) - rays
Last Answer : d) - rays
Description : Which one of the following waves requires a material medium for their propagation? a) Light waves b) X– rays c) -rays d) Sound waves
Last Answer : d) Sound waves
Description : In a half wave rectifier the rms value of AC component of the waves (a) Zero (b) Equal to DC value (c) More than DC value (d) Less than DC value
Last Answer : b) Equal to DC value
Description : Who was schrodinger ? -Physics
Last Answer : In the world's most famous thought experiment, physicist Erwin Schrödinger described how a cat in a box could be in an uncertain predicament. The peculiar rules of quantum theory meant that it could be both dead and alive, until the box was opened and the cat's state measured.
Description : A cobalt chloride solution soaked into a piece of cotton can be used as an indicator for changes in humidity levels. Pink indicates a high-humidity environment and blue a low-humidity environment. What ... the cobalt's waters of hydration. z) This is an illustration of the Schrodinger principle.
Last Answer : ANSWER: Y -- THE LOSS AND READSORPTION OF THE COBALT'S WATERS OF HYDRATION.
Description : The reverse process of photo-electric effect is called: a) Annihilation of matter b) Compton effect c) Pair production d) X-rays
Last Answer : d) X-rays
Description : X-rays can penetrate several ____ into a solid matter. a) millimeters b) meters c) centimeters d) kilometers
Last Answer : c) centimeters
Description : In annihilation of matter the photons produced fly off at the speed of a) Light b) Sound c) Twice the speed of light d) None
Last Answer : a) Light
Description : In the annihilation of matter the number of photons produced is a) One b) Two c) Three d) None
Last Answer : b) Two
Description : Who among the following evolved the concept of relationship between mass and energy? (1) Einstein (2) Planck (3) Dalton (4) Rutherford
Last Answer : (1) Einstein Explanation: Einstein correctly described the equivalence of mass and energy as “the most important upshot of the special theory of relativity” (Einstein 1919), for this result lies at the core of modern physics.
Description : Who proposed this concept “All motion is relative”? A. Albert Einstein (Answer) B. John Kepler C. Galileo Galilie D. None
Last Answer : A. Albert Einstein (Answer)
Description : Who discovered the concept of pendulum? A. Newton B. Einstein C. Galileo D. None
Last Answer : C. Galileo
Description : Who introduced the use of artifcial heart for surgery ? (1) Christian Barnard (2) Michael de Bakey (3) Walton Lillehel (4) Denton Cooly
Last Answer : Christian Barnard
Description : 1. The working of optical is based on which of electromagnetic waves? 2. By whom was Cholera bacillus discovered? 3. At present the Rajya Sabha consists of howmany members? 4. Where is the ... that? 19. How are the Himalayan rivers? 20. In Krishnadevaraya's court, who were Ashtadiggajas?
Last Answer : Answer : 1. Total internal reflection 2. Robert Koch 3. 245 4. East Africa 5. Bhaskara 6. Charles Dickens 7. Lowering bank rate 8. Silicon 9. Patagonia desert 10. Monarchial 11. Alexzander Fleming 12. ... . 16. 3 17. Increases 18. Multiply themselves 19. Snow fed 20. Eight great poets of his court