Chapter 11 – Dual Nature of Radiation and Matter
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Assuming an electron is confined to a 1nm wide region, find the wavelength in momentum using Heisenberg Uncertainty principal (ΔxΔp≈h). You can assume the uncertainty in position Δx and 1nm. Assuming p≅Δp, find the energy of the electron in electron volts.
09
Jun
Assuming an electron is confined to a 1nm wide region, find the wavelength in momentum using Heisenberg Uncertainty principal (ΔxΔp≈h). You can assume the uncertainty in position Δx and 1nm. Assuming p≅Δp, find the energy of the electron in electron volts. Assuming an electron is confined to a 1nm wide region find the energy of [...]
Consider a metal exposed to light of wavelength 600 nm. The maximum energy of the electrons doubles when light of wavelength 400 nm is used. Find the work function in eV.
09
Jun
Consider a metal exposed to light of wavelength 600 nm. The maximum energy of the electrons doubles when light of wavelength 400 nm is used. Find the work function in eV. Consider a metal exposed to light of wavelength 600 nm. The maximum energy of the electrons doubles when light of wavelength 400 nm is [...]
Two monochromatic beam A and B of equal intensity I, hit a screen. The number of photons hitting the screen by beam A is twice that by beam B. Then what inference can you make about their frequencies?
09
Jun
Two monochromatic beam A and B of equal intensity I, hit a screen. The number of photons hitting the screen by beam A is twice that by beam B. Then what inference can you make about their frequencies? hit a screen. The number of photons hitting the screen by beam A is twice that by [...]
There are two sources of light, each emitting with a power of 100 W. One emits X-rays of wavelength 1nm and the other visible light at 500 nm. Find the ratio of number of photons of X-rays to the photons of visible light of the given wavelength?
09
Jun
There are two sources of light, each emitting with a power of 100 W. One emits X-rays of wavelength 1nm and the other visible light at 500 nm. Find the ratio of number of photons of X-rays to the photons of visible light of the given wavelength? The wavelength of a photon needed to remove [...]
A particle moves in a closed orbit around the origin, due to a force which is directed towards the origin. The de-Broglie wavelength of the particles varies cyclically between two values λ1,λ2 with λ1>λ2. Which of the following statements are true?
09
Jun
A particle moves in a closed orbit around the origin, due to a force which is directed towards the origin. The de-Broglie wavelength of the particles varies cyclically between two values λ1,λ2 with λ1>λ2. Which of the following statements are true? A particle moves in a closed orbit around the origin due to a force [...]
A proton and an alpha – particle are accelerated using the same potential difference. How are the de-Broglie wavelengths lamba p and lamba alpha related to each other ?
09
Jun
A proton and an alpha – particle are accelerated using the same potential difference. How are the de-Broglie wavelengths lamba p and lamba alpha related to each other ? A proton and an alpha - particle are accelerated using the same potential difference. How are the de-Broglie wavelengths lamba p and lamba alpha related to [...]
Photons absorbed in matter are converted to heat. A source emitting n photons/ sec of frequency v is used to convert 1kg of ice at 0∘C to water at 0∘C. Then, the time T taken for the conversion
09
Jun
Photons absorbed in matter are converted to heat. A source emitting n photons/ sec of frequency v is used to convert 1kg of ice at 0∘C to water at 0∘C. Then, the time T taken for the conversion Photons absorbed in matter are converted to heat. A source emitting n photons/ sec of frequency v [...]
The de-Broglie wavelength of a photon is twice the de-Broglie wavelength of an electron. The speed of the electron is ve=c/100. Then.
09
Jun
The de-Broglie wavelength of a photon is twice the de-Broglie wavelength of an electron. The speed of the electron is ve=c/100. Then. The de-Broglie wavelength of a photon is twice the de-Broglie wavelength of an electron. The speed of the electron is ve=c/100. Then. June 9, 2021 Category: Chapter 11 - Dual Nature of Radiation [...]
Two particles A1 and A2 of masses m1,m2(m1>m2) have the same de Broglie wavelength. Then,
09
Jun
Two particles A1 and A2 of masses m1,m2(m1>m2) have the same de Broglie wavelength. Then, m2(m1>m2) have the same de Broglie wavelength. Then Two particles A1 and A2 of masses m1 June 9, 2021 Category: Chapter 11 - Dual Nature of Radiation and Matter , NCERT Exemplar Class 12 , Physics ,
An electron mass m with an initial velocity v = v0i is in an electric field E = E0j . If λ0 = h/mv0 it’s de Broglie wavelength at time t is given by
09
Jun
An electron mass m with an initial velocity v = v0i is in an electric field E = E0j . If λ0 = h/mv0 it’s de Broglie wavelength at time t is given by An electron mass m with an initial velocity v = v0i is in an electric field E = E0j . If [...]