Physics, 21.10.2019 20:00 elijah1090

What is the energy of a photon of blue light with a wavelength of 460 nm?

Answers: 2

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Answer from: makayla7635

We want to find the energy of a photon given that we know its wavelength.

We will see that the energy of the photon is:

$E = 4.3*10^{-9} J$

Now let's see how to get the

The energy of a photon of wavelength λ is given by:

$E =\frac{h*c}{ \lambda}$

Where:

$h = 6.626*10^{-34} J\cdot s$

c = 3*10^8 m/s

So we need to rewrite our wavelength in meters instead of nanometers, so the units coincide.

we know that:

$1 nm = 1*10^{-9} m$

Then:

$460 nm = 460*10^{-9} m = 4.6*10^{-7} m$

Now that we know all the values we need to use in the energy equation, we can write:

$E = \frac{(3*10^8m/s)*(6.626*10^{-34} J*s}{4.6*10^{-7}} = 4.3*10^{-9} J$

So we just found the energy of the photon.

If you want to learn more, you can read:

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Answer from: 21marmong

$E=4.321(10)^{-19} J$

Explanation:

The energy of a photon is given by:

$E=h\nu$ (1)

Where:

$h=6.626(10)^{-34}\frac{m^{2}kg}{s}$ is the Planck constant

$\nu$ is the frequency light

On the other hand, there is an inverse relationship between $\nu$ and the wavelength $\lambda$ :

$\nu=\frac{c}{\lambda}$ (2)

Where:

$c=3(10)^{8} m/s$ is the speed of light

$\lambda=460 nm=460(10)^{-9}m$ is the wavelength

Substituting (2) in (1):

$E=\frac{hc}{\lambda}$ (3)

$E=\frac{(6.626(10)^{-34}\frac{m^{2}kg}{s})(3(10)^{8} m/s)}{460(10)^{-9}m}$

Finally:

$E=4.321(10)^{-19} J$ This is the energy of a photon of blue light, in Joules.

Answer from: Quest

i dont think you are wrong for wanting to get even with someone who did you wrong.

(i'm an eye for an eye kind of person) but if this person hurt you in a sexual way, i dont suggest doing anything to him. he should be taken to the proper authorities, you could go to jail depending on what you do. if it was something small like your sibling took your spot on the couch, than yea, i would get even with him by taking one of his favorite snacks lol. but i dont suggest you doing anything illegal.

Answer from: Quest

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.

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