Dual Nature of Matter

The acceptor level of a p-type semiconductor is 6 eV . The maximum wavelength of light which can create a hole would be : Given hc $=1242 \mathrm{eV}$ nm ?

If the kinetic energy of a free electron doubles, it's de-Broglie wavelength changes by the factor

When light is incident on a metal surface the maximum kinetic energy of emitted electrons

A proton and an $\alpha$-particle are accelerated from rest by $2 \mathrm{~V}$ and $4 \mathrm{~V}$ potentials, respectively. The ratio of their de-Broglie wavelength is:

Proton (p) and electron (e) will have same deBroglie wavelength when the ratio of their momentum is (assume, $m_p=1849 \mathrm{~m}_{\mathrm{e}}$)

The de-Broglie wavelength of an electron moving with a velocity $\frac{c}{3}\left(c=3 \times 10^8 \mathrm{~m} / \mathrm{s}\right)$ is equal to the wavelength of photon. The ratio of the kinetic energies of electron and…

A plane electromagnetic wave is incident on a plane surface of area A, normally and is perfectly reflected. If energy E strikes the surface in time $t$ then force exerted on the surface is ($c=$ speed of light)

Electrons are accelerated through a potential difference $\mathrm{V}$ and protons are accelerated through a potential difference $4 \mathrm{~V}$. The de - Broglie wavelengths are $\lambda_{e}$ and $\lambda_{p}$ for…

Monochromatic light of wavelength $667 \mathrm{~nm}$ is produced by a helium neon laser. The power emitted is $9 \mathrm{~mW}$. The number of photons arriving per sec on the average at a target irradiated by this beam…

A plane electromagnetic wave is incident on a plane surface of area A, normally and is perfectly reflected. If energy E strikes the surface in timet then average pressure exerted on the surface is $(\mathrm{c}=$ speed…

A particle $X$ of mass $m$ and initial velocity $u$ collides with another particle $Y$ of mass $\frac{3m}{4}$, which is at rest. The collision is head-on and perfectly elastic. The ratio of de-Broglie wavelengths…

When photon of energy $4\cdot 0 \text{eV}$ strikes the surface of a metal $A$, the elected photoelectrons have maximum kinetic energy ${T}_{A} \text{eV}$ and de-Broglie wavelength ${λ}_{A}$. The maximum kinetic energy…