Free Printable de-Broglie matter waves

1.

A photon is

a)

a quantum number

b)

a positively charged particle

c)

electromagnetic energy

d)

an instrument for measuring light intensity

2.

Classical theory of radiation failed to explain photoelectric effect; however this phenomenon was explained on the basis of quantum theory by _____________

a)

Max Planck

b)

Einstein

c)

Compton

d)

Rutherford

3.

The rest mass of photon is _____________.

a)

$\frac{h\nu}{c}$

b)

$\frac{h\nu^2}{c}$

c)

zero

d)

$h\nu$

4.

Why wave nature of matter is not apparent to our daily observations?

a)

bodies travel with small velocities

b)

wavelength of the waves associated with the pretty heavy mass is very large

c)

bodies travel with large velocities

d)

wavelength of the waves associated with the pretty heavy mass is very small

5.

If ‘h’ is Planck’s constant and the wavelength is 0.01 A°, find momentum?

a)

$h\times10^{12}$

b)

$h\times10^2$

c)

h

d)

$h\times10^4$

6.

Energy of the photon can be represented by

a)

$h\nu c$

b)

$\frac{hc}{\lambda}$

c)

$hc\lambda$

d)

$h\nu$

7.

The energy of a photon corresponding to the visible light of maximum wavelength is approximately _______________

a)

7 eV

b)

1 eV

c)

3.2 eV

d)

1.76 eV

8.

The momentum of a photon is p, the corresponding wavelength is ____________

a)

$\frac{4}{p}$

b)

$\frac{p}{h}$

c)

$ph$

d)

$\frac{h}{p}$

9.

Which of the following statement is correct?

a)

No particle whether at rest or in motion is ever accompanied by matter waves

b)

Any particle in motion, whether charged or uncharged is accompanied by matter waves

c)

Only subatomic particles in motion are accompanied by matter waves

d)

Only a charged particles in motion are accompanied by matter waves

10.

The momentum of a photon of an electromagnetic radiation is $3.3\times10^{-29\ ^{ }}$ kg m/s. What is the frequency of the associated waves?

a)

$\lambda=\frac{h}{mv}$

b)

$\lambda=\frac{mv}{h}$

c)

$\lambda=\frac{hv}{m}$

d)

$\lambda=\frac{m}{hv}$

11.

The equation of motion of matter waves was derived by

a)

Heisenberg

b)

Bohr

c)

De Broglie

d)

Schrodinger

12.

The de-Broglie wave associated with a moving particle is generally

a)

A finite monochromatic wave train travelling with a velocity less than that of light

b)

An infinite monochromatic wave train having a phase velocity less than that of light

c)

A wave packed having a group velocity equal to that of the moving particle

d)

A wave packed having a group velocity greater than that of the moving particle

13.

Energy in a quantum is

a)

varies directly with frequencies

b)

varies inversely with frequencies

c)

same for all frequencies

d)

does not vary

14.

Calculate de-Broglie wavelength of an electron moving with velocity $10^7$ m/s.

a)

$10\ A^{\degree}$

b)

5 m

c)

$0.73\ A\degree$

d)

0.72 m

15.

Neglecting variation of mass with energy, the wavelength associated with an electron having a kinetic energy E in joule is proportional to

a)

$E^2$

b)

E

c)

$\sqrt{E}$

d)

$\frac{1}{\sqrt{E}}$

de-Broglie matter waves

Total questions: 15

Worksheet time: 8mins

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