Q.1.
Thermal radiation can only travel through which substances?
Q.2.
The inside container of a thermos bottle is silvered. Why?
Q.3.
Which of the following does use infrared radiation?
Q.4.
Which one of the following emits the most infrared radiation?
Q.5.
In an electric toaster, what methods of heat transfer cook the bread?
Q.6.
Thermal radiation travels at what speed?
Q.7.
Put the following in order of best to worst of infrared radiation:Red, dullWhite, shinyBlack, dullRed, shiny
Q.8.
Why are car radiators often painted matt black?
Q.9.
Which are the best emitters of thermal radiation?
Q.10.
In sunny countries, houses are often painted white. Why?