This is the form of energy that is transferred because of a difference in temperature.

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

i hope this you

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added