All Questions
Tagged with wavelength energy
44
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Are intensity vs wavelength graphs really continuous? [duplicate]
For hot bodies we generally draw graph between intensity and wavelength similar to one in picture.
My question is this graph really continous?
If it is continuous, does it not mean there are infinte ...
2
votes
1
answer
186
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In inelastic scattering between photons and electrons, how does light only partially transfer energy?
In the case of elastic scattering or absorption between photons and electrons, the incident light is either fully reflected or fully absorbed and hence it either retains its wavelength or ceases to ...
- 441
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68
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Very confused about pulse-echo measurements
Heres a link to the question im referring to just in case the image is not visible in the post - https://ibb.co/2vsZy90
Can someone please this mark scheme answer in simple terms. Firstly, what ...
- 105
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2
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57
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Confusion regarding wavelength of stationary waves
Imagine, we have an air column and the the temperature of the air was the same outside and inside the column. If sound waves from a tuning fork then enters the air column, the speed of the standing ...
- 105
7
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4
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1k
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Confused regarding the wavelength of standing waves and their relation with wave speed
Suppose we have an air column closed at one end and open at one end. We know, the general formula for the wavelength of the stationary waves of different harmonics will be equal to $4L/n$. My ...
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3
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Why don't we get infinite energy from a continous emission spectrum?
If the spectrum emitted contains all kinds of photons of all kinds of wavelengths, doesn't that mean it should have infinite number of photons of very small energies? For example, 4000 angstrom to ...
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2
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192
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How does doubling the de Broglie wavelength affect the kinetic energy of a subatomic particle? [closed]
I'm an AQA A-level student revising for my exam next week and I came across a question that I managed to solve, but a friend of mine used a different method and got the wrong answer. However, my ...
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2
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354
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Are gamma rays the limit of the frequency photons can attain, and if yes, why? [duplicate]
Recalling that the Planck constant is $6.62607015 \times 10^{-34} m^2kg/s$ and taking into account the formula $E=hf$, for the energy of photons, we can rapidly derive the energy of gamma rays, which ...
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4
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166
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Is energy rule violated here? [closed]
We know that for an EM radiation , energy is given by :
$$E = \frac{hc}{\lambda}$$
.
Where $h$ is Planck's constant , $c = 300000000$m/s and $\lambda$ is wavelength of the radiation.
Clearly, energy ...
- 239
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2
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136
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Does the 1/2 coefficient in kinetic energy stem from Newton, the De Broglie wavelength and length contraction? [closed]
This is my thinking. Everything has a De Broglie wavelength. From this the energy of an object can be calculated.
Now due to Special Relativity anything with a velocity experiences length contraction. ...
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66
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Upper limit of energy carried by one photon [duplicate]
energy carried by one photon, $E = hυ$ where $υ$ is frequency and $h =$ planck constant. Is there any upper limit to how much energy one photon can carry? or any upper limit of frequency?
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Why do lines become weaker in intensity as wavelength decreases?
In 1885 the first series was observed by Swedish school teacher Johann Jakob Balmer in the visible region of the hydrogen spectrum. This series is called the Balmer series. In Balmer series as the ...
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681
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Calculating the wavelength of incident photon in Compton scattering event
'In the Compton scattering event, the scattered photon has an energy of $120$ keV and the recoiling electron has an energy of $40$ keV. Find the wavelength of the incident photon.'
I thought, to solve ...
- 11
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127
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de Broglie wavelength for particles with mass [duplicate]
is $p=\frac{h}{\lambda}$ only true for massless particles? because generally $E=\sqrt{p^2c^2+m^2c^4}$, then if we equate it to $h\nu$ we get $$p=\sqrt{\frac{h^2}{\lambda^2}-m^2c^2}\neq\frac{h}{\lambda}...
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Can the energy of a photon be increased, thereby decreasing its wavelength and increasing its frequency?
I know about Inverse Compton Scattering, but is it theoretically possible to take photons with frequencies so low they cannot be detected, increase their energy and hence make them detectable?
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