Cooking Food with Electromagnetic Radiation
Electromagnetic radiation transfers energy that can heat and cook food. Different types serve distinct roles in cooking appliances.
Microwave Radiation
Microwaves are widely used in microwave ovens. They work by causing water molecules within the food to vibrate rapidly. This vibration generates heat through molecular friction, cooking the food efficiently.
Infrared Radiation
Infrared radiation is a form of heat energy. It is utilized in conventional ovens, broilers, and toasters. Infrared waves heat the surface of the food directly, leading to browning and cooking, similar to heat from a fire or the sun.
Conclusion on Cooking Radiations
Since both microwave radiation (in microwave ovens) and infrared radiation (in conventional ovens, grills, etc.) are actively used methods for cooking food, the correct identification includes both.
Important Questions from Electromagnetic Waves
The radio waves used for signaling and communication can be classified as which of the following?
- An electromagnetic wave propagates through a transparent, non-magnetic medium. If the relative permittivity of this medium is $\epsilon_r = 4$, and its relative permeability is $\mu_r = 1$, what is the speed of the electromagnetic wave in this medium? (Assume the speed of light in vacuum is $c = 3 \times 10^8$ m/s).
X-rays are produced when a target of suitable material element of high atomic mass is bombarded by a beam of fast moving and high energy particles such as:
Which of the following rays are used in doing LASIK (Laser - Assisted in Situ keratomileusis) eye surgery?
Arrange the following in the ascending order of their wavelength.
(i) Microwaves
(ii) Infrared rays
(iii) Visible rays
(iv) AM radio waves
(v) Gamma rays
(vi) X-rays
(vii) FM radio waves
