Question

Look at the diagram of a toasted cheese
sandwich being cooked in a griller.
a How does heat travel from the heating
element to the sandwich?
b Why can't the heat travel by conduction or
convection?​

Answer 1

Answer:

Heat is travelling via Radiation

Explanation:

1. Radiation happens when heat moves as energy waves, called infrared waves, directly from its source to something else. This is how the heat from the Sun gets to Earth
2. If there are no molecules, heat by convection and conduction cannot be transferred. ... Because convection and conduction both rely on molecules. In a perfect vacuum, there are no molecules, therefore no heat transfer by conduction or convection.