How did your phase contrast image of bacteria compare to your observations of the bacteria in the bright field mode?

The phase contrast image lets us see the bacteria in a clearer form with defined shades of cell organelles with the difference in the brightness. Here the image is clearly visible even without staining.

Where as without staining, the appearance of bacteria in the bright field mode only shows bright structure and not the color contrasts.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do