Question
Why are alkali metals most suited as photo-sensitive metals?
✓
Answer
- Low work function
Alkali metals have low work functions. Even visible radiation can eject out electrons from them. So alkali metals are the most suitable photo-sensitive metals.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The electric field in a region is directed outward and is proportional to the distance $r$ from the origin. Taking the electric potential at the origin to be zero,
→A $40\mu F$ capacitor in a defibrillator is charged to $3000\ V.$ The energy stored in the capacitor is sent through the patient during a pulse of duration $2ms.$ The power delivered to the patient is
→Newton postulated his corpuscular theory on the basis of (a) Newton’s rings(b) Colours of thin films(c) Rectilinear propagation of light(d) Dispersion of white light
The magnetic field at a point $x$ on the axis of a small bar magnet is equal to the field at a point $y$ on the equator of the same magnet. The ratio of the distances of $x$ and $y$ from the centre of the magnet is
→Choose the correct answer from the alternatives given.
The conduction current is the same as displacement current when the source is.
The conduction current is the same as displacement current when the source is.
A long wire $AB$ is placed on a table. Another wire $PQ$ of mass $1.0 g$ and length $50 \ cm$ is set to slide on two rails $PS$ and $QR.$ A current of $50A$ is passed through the wires. At what distance above $AB,$ will the wire $PQ$ be in equilibrium
→In a Young’s double slit experiment, the source illuminating the slits is changed from blue to violet. The width of the fringes (a) Increases(b) Decreases(c) Becomes unequal(d) Remains constant
The wavelength of the energy emitted when electron come from fourth orbit to second orbit in hydrogen is $20.397 \ cm.$ The wavelength of energy for the same transition in $\mathrm{He}^{+}$ is
→A concave mirror is used to focus the image of a flower on a nearby well 120 cm from the flower. If a lateral magnification of 16 is desired, the distance of the flower from the mirror should be(a) 8 cm (b) 12 cm (c) 80 cm(d) 120 cm
In a series $\text{RLC}$ circuit that is operating above the resonant frequency, the current.
→