Which of these will reflect light with the highest frequency?
an orange basketball
a blue candle
a green ribbon
a yellow banana

The correct answer is an orange basketball.

Explanation:

Frequency is defined as the number of waves that passes a given point per second. It is expressed in Hertz.

White light splits into 7 colors when passed through a medium having different refractive index. The colors are Red, Orange, Yellow, Green, Blue, Indigo and Violet.

The color having highest frequency and lowest wavelength is red.

The color having lowest frequency and highest wavelength is violet.

The order of highest frequency to lowest frequency of the colors follows:

Hence, the correct answer is an orange basketball.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.