Question

describing radiation
which statement accurately describes radiation?
○ radiation needs matter to transfer thermal energy.
○ thermal energy is transferred by electromagnetic waves.
○ ironing a shirt to take out wrinkles is an example of radiation.

Explanation:

To determine the correct statement about radiation:

1. Radiation does not need matter (unlike conduction/convection), so the first option is wrong.
2. Radiation transfers thermal energy via electromagnetic waves (e.g., heat from the sun), so this matches.
3. Ironing uses conduction (direct contact), not radiation, so the third option is wrong.

Answer:

B. Thermal energy is transferred by electromagnetic waves. (assuming the options are labeled A, B, C with A as "Radiation needs matter...", B as "Thermal energy...", C as "Ironing...")