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