Can a human see a single photon?

1 Answer

Answer :

Errrm, no. Photons are tiny. Really, really tiny.

Related questions

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 : 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 : Photon is the fundamental unit/ quantum of – (1) gravitation (2) electricity (3) magnetism (4) light

Last Answer : (4) light Explanation: A photon is an elementary particle, the quantum of light and all other forms of electromagnetic radiation. The modern photon concept was developed gradually by Albert Einstein.

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 : 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 : Photon is the fundamental unit/ quantum of (1) gravitation (2) electricity (3) magnetism (4) light

Last Answer : light

Description : Can humans ever directly see a photon? -Biology

Last Answer : Yes. In fact, photons are the only things that humans can directly see. A photon is a bit of light. Human eyes are specifically designed to detect light. This happens when a photon enters the eye and ... looking at a chair when it's really looking at a bunch of photons arranged in a chair pattern.

Description : What is a photon?

Last Answer : A photon is a particle of light, which has both wave-like and particle-like properties, and is an important concept in physics and quantum mechanics.

Description : What is a photon?

Last Answer : A photon is a type of elementary particle that is the quantum of electromagnetic radiation, such as light, and is the carrier of the electromagnetic force.

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 : At what temperature does a photon explode?

Last Answer : That’s because it doesn’t.

Description : What's the best way to decrease latency on the output of my Alesis Photon x25 onto FL Studio 7 running Windows Vista? (Does anybody out there know what I'm talking about?)

Last Answer : answer:It may be your computer spec not provided in the question description :( Latency would point to your machine not being able to process the inputs fast enough. I would look into a processor/ ... close memory/cpu intensive processes while you run FL. You can do this through the task manager.

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 : A dye absorbs a photon of wavelength `lambda` and re`-` emits the same energy into two phorons of wavelengths `lambda_(1)` and `lambda_(2)` respective

Last Answer : A dye absorbs a photon of wavelength `lambda` and re`-` emits the same energy into two phorons of wavelengths ` ... 2))/((lambda_(1)+lambda_(2))^(2))`

Description : The number of photons emitted in 10 hours by a 60 W sodium lamp `(lambda` of photon `= 6000 Å)`

Last Answer : The number of photons emitted in 10 hours by a 60 W sodium lamp `(lambda` of photon `= 6000 Å)` A. `6. ... C. `8.40xx10^(23)` D. `3.40xx10^(23)`

Description : A photon of gamma radiation knocks out a proton from `""_(12)Mg""^(24)` nucleus to form a)The isotope of parent nucleus b)The isobar of parent nucleus

Last Answer : A photon of gamma radiation knocks out a proton from `""_(12)Mg""^(24)` nucleus to form a)The isotope of ... )Na` D. the isobar of `._(11)^(23)Na`

Description : A stationary hydrogen atom emits a photon corresponding to the first line of the Lyman series. What is the velocity of recoil of the atom? `(m_(H)=1.6

Last Answer : A stationary hydrogen atom emits a photon corresponding to the first line of the Lyman series. What is the velocity ... `(m_(H)=1.672xx10^(-27) kg)`

Description : Whenever a photon is emitted by hydrogen in balmer series it is followed by another in lyman series what wavelength does this latter photon correspond

Last Answer : Whenever a photon is emitted by hydrogen in balmer series it is followed by another in ... what wavelength does this latter photon correspond to?

Description : A stationary helium ion emits a photon corresponding to the first line of Lyman series. That photon liberates a photoelectron form a stationary hydrog

Last Answer : A stationary helium ion emits a photon corresponding to the first line of Lyman series. That ... and ionisation energy of hydrogen atom=13.6ev.

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 : A hydrogen atom in ground state absorbs a photon of ultraviolet radiation of wavelength `50 nm` Assuming that the entire photon energy is taken up by

Last Answer : A hydrogen atom in ground state absorbs a photon of ultraviolet radiation of wavelength `50 nm` ... what kinetic energy will the electron be ejected?

Description : A hydrogen atom in state `n = 6` makes two successive transition and reaches the ground state in the first transition a photon of `1.13eV` is emitted

Last Answer : A hydrogen atom in state `n = 6` makes two successive transition and reaches the ground state in the ... is the value of n in the intermediate state?

Description : A positive ion having just one electron ejected it if a photon of wavelength `228Å` or lose is absorbed by it identify the ion

Last Answer : A positive ion having just one electron ejected it if a photon of wavelength `228Å` or lose is absorbed by it identify the ion

Description : Can Energy of a photon be any value along a continuous spectrum of energies?

Last Answer : I believe it can - the energy of a photon is the product of thefrequency and Plank's constant - and as far as I know, thefrequency is not quantized.

Description : What is photon ionizing radiation?

Last Answer : Need answer

Description : What is the wavelength of a radio photon from an A.M. radio station that broadcasts at 1360 kilohertz?

Last Answer : 300 / 1.36 = 220.588 metres (rounded to three decimalplaces).

Description : What is the wavelength of a photon with an energy of 4.56x10 ^-19 J?

Last Answer : This wavelength is 435,62 nm.

Description : What is the difference between a photon and an electron?

Last Answer : charge mass, Whether or not two can exist at the same place.

Description : The process by which plants convert light energy of photon (captured from sunrays) into chemical energy

Last Answer : Ans. Photosynthesis

Description : What is the photon energy for an infrared wave with frequency of 1012 Hz? a. 10.6 x 1034 joules b. 6.63 x 10-34 joules c. 6.63 x 10-22 joules d. 10.6 x 1022 joules

Last Answer : c. 6.63 x 10-22 joules

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 : Differentiate between the following pairs: (a) Telemeter and Multimeter: (b) Perimeter and Altimeter (c) Periscope and Microscope (d) Nucleon and Photon (e) Cusec and Comet

Last Answer : (a) Telemeter and Multimeter: Telemeter is used to convey the physical statistics to a distance, while a multimeter is a complex device, having a potentiometer and ammeter. (b) Perimeter and Altimeter Perimeter is ... packet. (e) Cusec and Comet Cusec is a measure of flow, while comet is an object.

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 : Communication using photon and optic fibre is known as

Last Answer : photonics.

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 : Max Planck received the noble prize in Physics in 1918 for his discovery of ? A. electron B. energy quanta (Answer) C. photon D. positron

Last Answer : B. energy quanta (Answer)

Description : When a photon strikes the rhodopsin: a. bleaching occurs b. retinal molecules are bound to rhodopsin c. the intracellular cGMP is increased d. the sodium ion channels are closed

Last Answer : the sodium ion channels are closed

Description : PAR (Photo-synthetically active radiation) is measured in (A)Photon (B) Watts (C) Einstein (D) Quantum

Last Answer : (C) Einstein

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 : The energy of the photon is ∙ a. Directly proportional to its bandwidth ∙ b. Directly proportional to the Planck’s constant ∙ c. Directly proportional to Boltzmann’s constant ∙ d. Inversely proportional to the Planck’s constant

Last Answer : Directly proportional to the Planck’s constant

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 : 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 : What is the photon energy for an infrared wave with frequency of 1012 Hz? ∙ a. 10.6 x 1034 joules ∙ b. 6.63 x 10-34 joules ∙ c. 6.63 x 10-22 joules ∙ d. 10.6 x 1022 joules

Last Answer : ∙ c. 6.63 x 10-22 joules