Advertisements
Advertisements
Questions
Name two sources of ultraviolet radiation.
State any one source of ultraviolet radiation.
Advertisements
Solution
- Sun
- Electric arc
- Mercury lamp
- Halogen lamp
Notes
Students should refer to the answer according to their questions.
APPEARS IN
RELATED QUESTIONS
What role dose infra-red radiation play in maintain the Earth’s warmth
Name the phenomenon which shows the quantum nature of electromagnetic radiation.
State Moseley's law
Give the range of wavelength of the electromagnetic waves visible to us.
Name the region beyond the violet end of the spectrum called.
State the approximate range of wavelength associated with visible light.
An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60 cm Calculate the velocity of the wave.
Is it possible that in a Coolidge tube characteristic Lα X-rays are emitted but not Kα X-rays?
50% of the X-rays coming from a Coolidge tube are able to pass through a 0.1 mm thick aluminium foil. If the potential difference between the target and the filament is increased, the fraction of the X-rays passing through the same foil will be
The wavelength of Kα X-ray of tungsten is 21.3 pm. It takes 11.3 keV to knock out an electron from the L shell of a tungsten atom. What should be the minimum accelerating voltage across an X-ray tube having tungsten target which allows production of Kα X-ray?
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Name the radiation of the electromagnetic spectrum which is used for the following:
For taking photographs of the sky during the night and foggy conditions . Give the frequency range
Choose the correct option.
Earth’s atmosphere is richest in
What are the ultraviolet rays?
Calculate the wavelength of a microwave of a frequency of 8.0 GHz.
Which of the following is a tool used for separating the different color wavelengths from each other?
For television broadcasting, the frequency employed is normally
The magnetic field of a beam emerging from a filter facing a floodlight is given by B0 = 12 × 10–8 sin (1.20 × 107z – 3.60 × 1015t) T. What is the average intensity of the beam?
Which one of the following electromagnetic radiation has the least wavelength?
