photosynthesis means green plants convert from solar energy into carbohydrates and food and oxygen & food contains chemical energy ->  photosynthesis converts solar energy into chemical energy  photosynthesis converts solar energy into chemical energy & a leaf performs photosynthesis ->  a leaf converts solar energy into chemical energy  a leaf converts solar energy into chemical energy & solar cells convert solar energy into electrical energy -> both a leaf and solar cell convert solar energy to another form of energy