Which of the following principles is used to concentrate sunlight in solar cookers?
A. Rarefaction
B. Evaporation
C. Specular reflection
D. Radiation
Answer:C
Which of the following principles is used to concentrate sunlight in solar cookers?
A. Rarefaction B. Evaporation C. Specular reflection D. Radiation
Explanation: Specular reflection is used to concentrate sunlight in solar cookers. Evaporation is the process of liquid, particularly water turning into gas. Rarefaction is the reduction in density of air or gas.