What is a band gap?

A p -n photodiode is fabricated from a semiconductor with band gap of 2.8 eV . Can it detect a wavelength of 6000nm ?

What is forbidden gap in a solid crystal?

Three photo diods D_1 , D_2 and D_3 are made of semiconductors having band gaps of 2.5 eV, 2eV and 3eV, respectively. Which ones will able to detect light of wave length 6000 overset @(A) ?

Our body contains a large number of Cells "L" which are the longest cells in the body. L has long and short branch called as 'M' and 'N' respectively there is a gap 'O' between two 'L' cells, through which nerve impulse transfer by release of chemical substance 'P' : What is the gap 'O'?

the energy band gap is maximum in

The energy levels of holes are A. in the valence bond B. in the conduction bond C. on the bond gap but dose to conduction band D. in the bond gap but close to valence band

In a meter bridge experiment, the unknown resistance X in the left gap and a known resistance of 60 Omega in right gap, null point is obtained at l cm from left. If the unknown resistance X is shunted by an equal resistance, what should be the value of known resistance in the right gap in order to get the null point at the same place?

Take a long rubber band and cut it at one point . At one of its ends tie a clean washed stone or a 50g weight as shown in figure Now hold the other end of the rubber band and make a mark there . Keep the stone hanging in air and measure the length of the rubber band from the stone to the mark made earlier . now take water in a pot and hold the rubber band at such a height that the stone sinks in it . again measure the length of the rubber band up to the mark . : What is observed ?:

The unknown resistance is placed in a left gap and a resistance of 50 Omega in right gap of meter bridge. The null point is obtained at 60 cm from the right gap. Determine the unknown resistance.