How are the particles of a liquid is different from the particles of gas

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

Ineed the answer to question 1 , i’m desperate

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt