The energy band gap of GaAs is 1.4ev. calculate the optimum wavelength of the light for photovoltaic generation in a GaAs solar cell

The wavelength is  

Explanation:

From the question we are told that

   The  energy band gap is  

Generally the energy of  a single photon of light emitted for an electron jump in a GaAS solar cell is mathematically represented as

Where  h is the Planck's  constant with values

and  c is  the speed of light with values  

So  

substituting values

answer; /// the above statement is (true);

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..