Concept explainers
Interpretation:
The number of photons emitted by a light bulb per second is to be calculated for the given wavelength of
Concept introduction:
The energy of a photon can be expressed as
Here,
The relationship between meters and nanometres can be expressed as
To convert nanometers to meters, the conversion factor is
The relationship between
To convert
to
The number of photons emitted per second can be evaluated as
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Chemistry
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- The lasers used in supermarket scanners emit red light at a wavelength of 633 nm. Compact disc players use lasers that emit light (that is not visible) at 840 nm. Which photonsthose emitted by supermarket scanners or compact disc (CD) playerscontain more energy per photon? Supermarket scanners CD players They both contain the same amount of energy per photon.arrow_forward6.17 The laser in most supermarket barcode scanners operates at a wavelength of 632.8 nm. What is the energy of a single photon emitted by such a laser? What is the energy of one mole of these photons?arrow_forwardThis laser emits green light with a wavelength of 533 nm. (a) What is the energy, in joules, of one photon of light at this wavelength? (b) If a particular laser produces 1.00 watt (W) of power (1 W = 1 J/s), how many photons are produced each second by the laser?arrow_forward
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