Question
Explain the photoelectric effect when the radiation is incident on different metals?

Answer

Metals like Zinc $( Zn )$, Cadmium (Cd) Magnesium ( Mg ) get a photoelectric effect by incidenting ultraviolet light of sufficient frequency on them.
Some alkali metals such as Lithium (Li), Sodium (Na), Potassium (K), Cesium (Cs) and Rubidium (Rb) exhibit a photoelectric effect when exposed to visible light. These metals are called light sensitive (photosensitive) metals.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A silver wire has a resistance of $2.1\ \Omega\ \text{at}\ 27.5^\circ\text{C},$ and a resistance of $2.7\ \Omega\ \text{at}\ 100^\circ\text{C}.$ Determine the temperature coefficient of resistivity of silver.
A metallic sphere is placed in a uniform electric field. Which one of paths a, b, c and d shown in the figure will be followed by the field lines and why?
The area of cross-section of the wider tube shown in  is 900cm2. If the boy standing on the. Piston weighs 45kg, find the difference in the levels of water in the two tubes.

A parallel beam of light of 500 nm falls on a narrow slit and the resulting diffraction pattern is observed on a screen 1 m away. It is observed that the first minimum is at a distance of 2.5 mm from the centre of the screen. Calculate the width of the slit.
A load of 10kg is suspended by a metal wire 3m long and having a cross-sectional area 4mm2. Find.
  1. The stress.
  2. The strain and.
  3. The elongation. Young's modulus of the metal is 2.0 × 10N11N/ m2.
Explain the relationship between mass and energy from Einstein's theory of special relativity.
Explain the Construction and working of gold leaf electroscope.
Give an explanation about electric field lines and explain how they can be drawn.
A long narrow horizontal slit is placed 1mm above a horizontal plane mirror. The interference between the light coming directly from the slit and that after reflection is seen on a screen 1.0m away from the slit. Find the fringe-width if the light used has a wavelength of 700nm.
Whether the diffraction effects from a slit will be more clearly visible or less clearly, if the slit-width is increased?