Advertisements
Advertisements
Question
Name two electromagnetic waves of frequency smaller than that of violet light. State one use of each.
Advertisements
Solution
1) Ultraviolet radiations - 100 Å to 4000 Å
Use: For detecting purity of gems, eggs, ghee, etc.
2) X-rays - 0.1 Å to 100 Å
Use: For detecting fracture in bones, teeth, etc.
RELATED QUESTIONS
To which part of electromagnetic spectrum does a wave of frequency 3 × 1013 Hz belong?
What do you understand by the statement, "Electromagnetic waves transport momentum"?
State Moseley's law
Which part of electromagnetic spectrum is used in radar systems?
Can X-rays be used for photoelectric effect?
Find the cutoff wavelength for the continuous X-rays coming from an X-ray tube operating at 30 kV.
(Use Planck constant h = 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Name the radiation which can be detected by thermopile.
Answer briefly.
What are radio waves?
What happens to the intensity of light from a bulb if the distance from the bulb is doubled? As a laser beam travels across the length of a room, its intensity essentially remains constant. What geometrical characteristic of LASER beam is responsible for the constant intensity which is missing in the case of light from the bulb?
Write two uses of the following radiation.
X-rays
