MEDIUM
NEET
IMPORTANT
Earn 100
What is photoelectric effect? Derive their laws from Einstein's photoelectric equation .
Important Questions on Dual Nature of Radiation and Matter
EASY
NEET
IMPORTANT
Every metal has a definite work function. Why do all photoelectrons not come out with the same energy even if incident radiation is monochromatic? Why there is an energy distribution of photoelectrons ?
MEDIUM
NEET
IMPORTANT
The work function of caesium is . Find
a) The threshold frequency for caesium and
b) The wavelength of the incident light if photocurrent is brought to zero by stopping potential of .
EASY
NEET
IMPORTANT
A point source of light is placed at a distance of from a photocell and its cut-off potential . If the distance between point source and photocell is halved, then the cut-off potential will be
EASY
NEET
IMPORTANT
In photoelectric effect, the electrons are ejected from the metal surface, if the incident light has a certain maximum
EASY
NEET
IMPORTANT
Name the phenomenon which illustrate the particle nature of light.
EASY
NEET
IMPORTANT
How many electron volts make up one joule?
EASY
NEET
IMPORTANT
What is de-Broglie wavelength of a object moving at a speed of ?
EASY
NEET
IMPORTANT
What is a photon? State its properties.
