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malfutka [58]
1 year ago
6

A 100 W sodium lamp radiates energy uniformly in all directions. The lamp is located at the centre of a large sphere that absorb

s all the sodium light which is incident on it. The wavelength of the sodium light is 589 nm. At what rate are the photons from the lamp associated with the sodium light
Physics
1 answer:
ICE Princess25 [194]1 year ago
7 0

The rate at which photons from the lamp are associated with the sodium light is 2.96×10^{20}.

Power of the sodium lamp, P=100 W

The wavelength of the emitted sodium light, λ=589 nm = 589×10^{-9}m

Planck's constant, h=6.626×10^{-34}Js

Speed of light, c= 3×10^{8}m/s

(a)The energy per photon associated with the sodium light is given as

E =hcλ

E =6.626×10^{-34}×3×108/589×10^{-9}=3.37×10^{-19}J

E =\frac{3.37*10^{-19} }{1.6*10^{-19} }=2.11eV

(b)Number of photons delivered to the sphere = n

The equation for power can be written as P=nE

∴n =PE

=1003.37×10^{-19} =2.96×10^{20}photons/s

Therefore, every second, 2.96×10^{20} photons are delivered to the sphere.

To know more about photons refer to: brainly.com/question/26412768

#SPJ4

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D. your brain is processing things on the conscious and unconscious

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In a simple electric circuit, a 110-volt electric heater
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Explanation:

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When a guitar string is plucked, in what direction does the wave travel? In what directions does the string vibrate?
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Using energy considerations, calculate the average force (in N) a 67.0 kg sprinter exerts backward on the track to accelerate fr
Illusion [34]

Answer:

F_{sprinter}=110.4N

Explanation:

Given data

Mass m=67.0 kg

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Initial Speed vi=2.00 m/s

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From work-energy theorem we know that the work done equals the change in kinetic energy

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So

W=1/2mv_{f}^2-1/2mv_{i}^2\\F_{total}=\frac{1/2mv_{f}^2-1/2mv_{i}^2}{d} \\F_{total}=\frac{1/2(67.0kg)(8.00m/s)^2-1/2(67.0kg)(2.00m/s)^2}{25.0m} \\F_{total}=80.4N

and we know that the force the sprinter exerted Fsprinter the force of the headwind Fwind=30.0N

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F_{sprinter}=F_{total}+F_{wind}\\F_{sprinter}=80.4N+30N\\F_{sprinter}=110.4N  

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3 years ago
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