Would it be feasible to install a series of magnetrons or something else on the underside of a gliders fuselage and wings in order to heat the air beneath the glider and ultimately cause the glider to obtain high altitude flight or obtain flight when thermals are not available? If hot air rises would you theoretically be able to artificially heat the air beneath a glider in order to achieve high altitude flight?
I was watching videos about gliders and I noticed that thermal air pockets are often required to achieve altitude gain. I'm a dumb guy so excuse me if this is a ridiculously dumb question.