Description : Photon is the fundamental unit/ quantum of (1) gravitation (2) electricity (3) magnetism (4) light
Last Answer : light
Description : The quantum of light is called: a. an erg b. an e-v c. a photon d. a phonon
Last Answer : c. a photon
Description : Gauss' law of electricity, Gauss' law of magnetism, Faraday's law of induction, and Amperes' law form the basic equations of electromagnetism. This combination is collectively known as: w) Coulomb's equations x) Volta's equations y) Fermi's equations z) Maxwell's equations
Last Answer : ANSWER: Z -- MAXWELL'S EQUATIONS
Description : A hydrogen like atom with atomic number Z is in an excited state of quantum number 2n. It can emit a maximum energy photon of 204 eV. If it makes a tr
Last Answer : A hydrogen like atom with atomic number Z is in an excited state of quantum number 2n. It can emit a ... state energy of hydrogen atom is - 13. 6 eV.
Description : What is the difference between Quantum and photon?
Last Answer : Ans. The smallest packet of Energy of any radiation is called as Quantum and that of Light is known as Photon.
Description : PAR (Photo-synthetically active radiation) is measured in (A)Photon (B) Watts (C) Einstein (D) Quantum
Last Answer : (C) Einstein
Description : The _____ of a detector is the fraction of incident photons that produce a photoelectron or electron-hole pair ∙ a. Responsitivity ∙ b. Photon efficiency ∙ c. Aperture ∙ d. Quantum efficiency
Last Answer : d. Quantum efficiency
Description : How are magnetism and electricity the same?
Last Answer : electromagnetic force
Description : Who discovered the link between electricity and magnetism?
Last Answer : Michel Faraday
Description : Who discovered the link between electricity and magnetism ? (1) Volta (2) Maxwell (3) Diesel (4) Michael Faraday
Last Answer : Maxwell
Description : The energy associated with one photon of a light beam is proportional to one of the following. Is it proportional to: w) the intensity of the light source from which it came x) the number of photons in the beam y) the frequency of the photon z) the speed of the photon
Last Answer : ANSWER: Y -- THE FREQUENCY OF THE PHOTON
Description : Class 9th CBSE Physics CBQ'S (Case Base Study) Gravitation -Physics
Last Answer : The universe has a lot of forces, a lot of pushes and pulls. We're always pushing or pulling something, even if only the ground. But it turns out that in physics, there are really only four fundamental forces from which ... ----------------------------- More questions to be added shortly...
Description : Fill in the blank with the most appropriate option. The Universal Constant of Gravitation is _______. (1) 6.67 x 10¹⁰ Nm²/kg (2) 6.76 x 10⁻¹⁰ Nm²/kg² (3) 6.67 x 10⁻¹¹ Nm²/kg² (4) 9.8 Nm²/kg²
Last Answer : (3) 6.67 x 10⁻¹¹ Nm²/kg² Explanation: The gravitational constant (also known as the universal gravitational constant), is an empirical physical constant involved in the calculation of ... Isaac Newton's law of universal gravitation and in Albert Einstein's general theory of relativity.
Description : When milk is churned, the cream separates from it clue to: (1) Frictional force (2) Centrifugal force (3) Gravitation al force (4) Viscous forces
Last Answer : (2) Centrifugal force Explanation: The extraction of cream happens because of the work of centrifugal force which works outward. The separation of cream from milk is based on the fact that when liquids ... . Milk can be regarded as two liquids of different specific gravities, the serum and the fat.
Description : Who defined the law of gravitation? (1) Newton (2) Archimedes (3) Galileo (4) Faraday
Last Answer : (1) Newton Explanation: Sir Isaac Newton brought out his monograph, titled `Philosoplliae Naturalis Principia Mathematica,' in 1687. In this work, Newton described universal gravitation and ... gravitation, thus removing the last doubts about helio-centrism and advancing the Scientific Revolution.
Description : According to Newton's law of universal gravitation, any two particles of finite mass attract one another with a force which is A. Inversely proportional to the product of their masses and ... the product of their masses and inversely proportional to the square of their distance apart
Last Answer : Directly proportional to the product of their masses and inversely proportional to the square of their distance apart
Description : Albert Einstein received the Nobel prize in physics for his work on: w) gravitation x) relativity y) photoelectric effect z) Brownian motion
Last Answer : ANSWER: Y -- PHOTOELECTRIC EFFECT
Description : Who defined the law of gravitation ? (1) Newton (2) Archimedes (3) Galileo (4) Faraday
Last Answer : Newton
Description : The quantum theory of light was given by – (1) Einstein (2) Plank (3) Newton (4) Faraday
Last Answer : (2) Plank Explanation: The Quantum theory of light was first discovered by Max Planck. In 1900, Planck, attempting to explain body radiation suggested that although light was a wave.
Description : Can a photon be smaller than a Planck sphere?
Last Answer : The planck length is 1.616 X 10-35 meters long. Now . a photon is a conundrum because it seems to have mass, but acts like a wave (pure energy). From what I understand of the facts, photons take up even ... enough. I'll see if BBE can weigh in on this with how he understands it as a PhD of physics.
Description : Can a human see a single photon?
Last Answer : Errrm, no. Photons are tiny. Really, really tiny.
Description : If an electron and a photon have the same wavelength, then they will have the same – (1) velocity (2) linear momentum (3) angular momentum (4) energy
Last Answer : (2) linear momentum Explanation: When a non-relativistic electron and a non-relativistic proton are moving and have the same de Broglie wavelength, then they will have the same linear mo-mentum p = mv.
Description : In changing from an energy state of -1.51 electron-volts to -3.40 electron-volts, an atom emits a photon whose energy is: w) 1.51 electron-volts x) 1.89 electron-volts y) 3.40 electron-volts z) 4.91 electron-volts
Last Answer : ANSWER: X -- 1.89 ELECTRON-VOLTS
Description : In the Compton effect, a photon of wavelength l (read: lambdw) collides with a stationary electron. The wavelength of the emitted photon is: w) longer than l x) shorter than l y) the same as l z) no photon is emitted
Last Answer : ANSWER: W -- LONGER THAN l
Description : The mass spectrograph directly yields a value for which one of the following? w) mass of a photon x) mass of a neutron y) masses of isotopes of elements z) mass to charge ratio of ions
Last Answer : ANSWER: Z -- MASS TO CHARGE RATIO OF IONS
Description : The ENERGY associated with a photon depends upon the photon's: w) velocity x) frequency y) amplitude z) the brightness of the source from which it comes
Last Answer : ANSWER: X -- FREQUENCY
Description : An x-ray photon collides with a free electron, and the photon is scattered. During this collision there is conservation of: w) momentum but not energy x) neither momentum nor energy y) energy but not momentum z) both momentum and energy
Last Answer : ANSWER: Z -- BOTH MOMENTUM AND ENERGY
Description : The collision between a photon and a free electron was first explained by which of the following scientists? w) Einstein x) Heisenberg y) Compton z) Bohr
Last Answer : ANSWER: Y -- COMPTON
Description : If an electron and a photon have the same wavelength, then they will have the same (1) velocity (2) linear momentum (3) angular momentum (4) energy
Last Answer : linear momentum
Description : Where was the first magnetism discovered ?
Last Answer : Magnetism was first discovered in China.
Description : When a piece of iron is rubbed with a magnet it acquires magnetism ' What kind of change is this and why ?
Last Answer : When a piece of iron is rubbed by a magnet, it acquires magnetism ' is a physical or positional change. This is because when rubbed by a magnet, no other substance is formed from iron. Again , when a piece of magnetized iron is heated, it loses its magnetism and is converted into ordinary iron.
Description : What is magnetism ?
Last Answer : The attractive and directional religion of a magnet is called its magnetism. In other words, the force of a magnet is called magnetism. Without magnetism, matter cannot be considered as magnet.
Description : Magnetism in materials is due to - (1) electrons at rest (2) circular motion of electrons (3) protons at rest (4) all neutrons at rest
Last Answer : (2) circular motion of electrons Explanation: Myopia is commonly known shortsighted. It is a condition of the eye where the light that comes in does not directly focus on the retina but in ... most commonly correct myopia through the use of corrective lenses, such as glasses or contact lenses.
Description : Enrichment of uranium by gaseous diffusion relies on the fact that uranium-235 diffuses through holes in the barriers more readily than uranium-238 does because uranium-235 is: w) a different chemical ... x) a different wavelength. y) resistant to magnetism. z) slightly lighter than uranium-238.
Last Answer : ANSWER: Z -- SLIGHTLY LIGHTER THAN URANIUM-238.
Description : Magnetism in materials is due to (1) electrons at rest (2) circular motion of electrons (3) protons at rest (4) all neutrons at rest
Last Answer : circular motion of electrons
Description : How slow can we make a beam or photon of light go?
Last Answer : Over 10 years ago a research team at Harvard slowed a beam of light down to 38 mph, (61 km/h). Physicists Slow Speed of Light I’m sure they’ve gone even slower since that time.
Description : How does a photon accelerate to light speed so quickly? -Space
Last Answer : A photon of light does not accelerate to light speed. Rather, a photon is already traveling at light speed c when it is created. It's not like a photon jumps from a speed of zero to light speed ... source: US Department of Health and Human Services. Source: wtamu.edu by Sir Christopher S Baird......
Description : The process by which plants convert light energy of photon (captured from sunrays) into chemical energy
Last Answer : Ans. Photosynthesis
Description : Calculate the energy of the photon of infrared light energy at 1.55µm A. 1.28x10-19 J B. 1.6 x10-19 J C. 1.22 x10-16 J D. 1.9 x10-14 J
Last Answer : A. 1.28x10-19 J
Description : All of the following are electromagnetic radiations except-----? A. Red light B. Sound waves (Answer) C. X-Rays D. Photon
Last Answer : B. Sound waves (Answer)
Description : The law that states “When visible light of high frequency electromagnetic radiation illuminates a metallic surface, electrons are emitted” is known as ____________. ∙ A. Einstein law of photon ∙ B. Marconi’s law ∙ C. Maxwell’s law ∙ D. Plank’s law
Last Answer : D. Plank’s law
Description : Which of the following terms best describes the reason that light is refracted at different angles? ∙ A. Photon energy changes with wavelength ∙ B. Light is refracted as a function of surface smoothness ∙ ... determined partly by a and b ∙ D. The angle is determined by the index of the materials
Last Answer : ∙ D. The angle is determined by the index of the materials
Description : Optical detectors are square-law devices because they respond to _____ rather than amplitude ∙ a. Intensity ∙ b. Light ∙ c. Density ∙ d. Photon
Last Answer : a. Intensity
Description : Whichofthe followingterms describesthe reason thatlightisrefractedat different angles? a. Photon energy changes with wavelength b. Light is refracted as a function of surface smoothness c. The angle is determined partly by a and b d. The angle is determined by the index of the materials
Last Answer : d. The angle is determined by the index of the materials
Description : Given light of wavelength λa = 600nm and light of λb = 550nm, which has a higher energy per photon? (a) Ea > Eb (b) Ea = Eb (c) Neither has energy because light at these wavelengths carries no energy (d) Eb > Ea
Last Answer : (d) Eb > Ea
Description : What has a form of energy that can produce heat light magnetism and electrical charges?
Last Answer : if you mean to have commas between heat, light, magnetism, andelectrical charges then there is none. if heat light magnetism isall one thing then you're on your own.
Description : How can gravitation force not have a speed?
Last Answer : No, it does have a speed, the speed of light. Who told you it didn’t?
Description : Coulomb's law for the force between electric charges most closely resembles a.Newton's laws of motion b.Law of conservation of energy c.Gauss's theorem d.Newton's law of gravitation e.None of the above
Last Answer : d. Newton's law of gravitation
Description : The statement that the sum of the kinetic and potential energies of a particle in the earth's gravitational field is constant is known as a.Principle of conservation of mechanical energy b.Law of gravitation c.Newton's law d.Principle of conservation of momentum e.Law of nature
Last Answer : a. Principle of conservation of mechanical energy
Description : What is the importance of universal law of gravitation ? -Science
Last Answer : Importance of The Universal Law of Gravitation It binds us to the earth. It is responsible for the motion of the moon around the earth. It is responsible for the motion of planets around the Sun. Gravitational force of moon causes tides in seas on earth.