Back to DUAL NATURE OF RADIATION AND MATTER

NEET UG PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER

1 Hard

1 of 1

Application +4 | -1

The ratio of the power of a light source

\text{S}_1

to that the light source

\mathrm{S}_2

is 2.

\mathrm{S}_1

is emitting

2 \times 10^{15}

photons per second at 600 nm. If the wavelength of the source

\text{S}_2

is 300 nm, then the number of photons per second emitted by

\mathrm{S}_2

is _____

\times 10^{14}.

View answer and explanation

Correct option: A

Option D (Statement-1 is false, Statement-2 is true) is correct because while the momentum is the same, energy depends on the particle's mass and velocity.

More Questions from DUAL NATURE OF RADIATION AND MATTER

Practice All Chapter MCQs →

If the Broglie wavelengths associated with a proton and an

\alpha

- particle are equal, then the ratio of velocities of the proton and the

\alpha

- particle will be: If the wavelength of incident light changes from 400 nm to 300 nm, the stopping potential for photoelectrons emitted from a surface becomes approximately In photo-electric effect, when graph is plotted for stopping potential versus frequency of incident light, for different metals, then: The radiation corresponding to

3 \to 2

transition of hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of

3 \times {10^{ - 4}}\,T.

If the radius of the largest circular path followed by these electrons is 10.0 mm, the work function of the metal is close to The shortest wavelength of

X

-rays emitted from an

X

-ray tube depends on the Planck’s constant has the dimensions of