Advertisements
Advertisements
प्रश्न
State three properties of infrared radiations similar to that of visible light.
Advertisements
उत्तर
(i) Infrared radiations and visible light both travel in a vacuum with a speed of 3 × 108 ms−1.
(ii) Both the infrared radiations and the visible light obey the laws of reflection and refraction.
(iii) Both the infrared radiations and the visible light are electromagnetic waves.
संबंधित प्रश्न
Identify the part of the electromagnetic spectrum which is suitable for radar system used in aircraft navigation.
A radio can tune in to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wavelength band?
State Moseley's law
Name the rays or waves of highest frequency .
Frequencies of Kα X-rays of different materials are measured. Which one of the graphs in the figure may represent the relation between the frequency v and the atomic number Z ?

An e.m. wave exerts pressure on the surface on which it is incident. Justify.
The fundamental frequency of an open organ pipe is 300 Hz. The first overtone of this pipe has same frequency as first overtone of a closed organ pipe. If speed of sound is 330 m/s, then the length of closed organ pipe is:
The electric field intensity produced by the radiations coming from 100 W bulb at a 3 m distance is E. The electric field intensity produced by the radiations coming from 50 W bulb at the same distance is ______.
Why does microwave oven heats up a food item containing water molecules most efficiently?
Photons of an electromagnetic radiation has an energy 11 keV each. To which region of electromagnetic spectrum does it belong?
