If an electron,hydrogen nucleus,helium nucleus,and neon nucleus are all moving with the same velocity,then the wavelengths associated with these particles are in the order:

If the total energy of an electron in a hydrogen atom in an excited state is $-3.4 \text{ eV}$,then the de-Broglie wavelength of the electron is

Dual behavior of matter proposed by de Broglie led to the discovery of electron microscope, often used for the highly magnified images of biological molecules and other types of material. If the velocity of the electron in this microscope is $1.6 \times 10^{6} \,ms^{-1}$, calculate the de Broglie wavelength associated with this electron.

Observe the following graph for the de-Broglie wavelength of a hypothetical charged particle $(q = 1.6 \times 10^{-19} \ C)$. Find the mass of the particle $(h = 6.0 \times 10^{-34} \ J \cdot s)$.

State the de-Broglie principle and explain it.

The de Broglie wavelength of a tennis ball of $60 \ g$ moving with a velocity of $10 \ m/s$ is approximately