Advertisements
Advertisements
Question
X-ray and visible light travel at the same speed in vacuum. Do they travel at the same speed in glass?
Advertisements
Solution
Speed of light in any material medium is inversely proportional to the refractive index of the medium. Since refractive index of glass for X-ray is less than that for visible light, an X-ray will travel at a faster speed than visible light in glass.
APPEARS IN
RELATED QUESTIONS
If the earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
To which part of electromagnetic spectrum does a wave of frequency 3 × 1013 Hz belong?
Name the electromagnetic radiations used for (a) water purification, and (b) eye surgery.
(a) Give a list of at least five radiations, in order of their increasing frequencies, which make up the complete electromagnetic spectrum.
(b) Which of the radiation mentioned by you in part (a) has the highest penetrating power.
Two waves A and B have wavelength 0.01 Å and 9000 Å respectively.
- Name the two waves.
- Compare the speeds of these waves when they travel in vacuum.
Can a hydrogen atom emit characteristic X-rays?
Moseley's Law for characteristic X-ray is √v = a(Z − b). Here,
Visible light passing through a circular hole forms a diffraction disc of radius 0.1 mm on a screen. If an X-ray is passed through the same setup, the radius of the diffraction disc will be
Find the energy, the frequency and the momentum of an X-ray photon of wavelength 0.10 nm.
(Use Planck constant h = 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
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 scientist who discovered Visible light
Name the part of the electromagnetic spectrum which is:
Produced by bombarding a metal target with high electrons.
Define the term "Intensity" in the photon picture of electromagnetic radiation.
Name two sources of ultraviolet radiation.
State two uses of infrared radiations.
Choose the correct option.
Earth’s atmosphere is richest in
Answer briefly.
What is a carrier wave?
Identify the electromagnetic radiation and write its wavelength range, which is used to kill germs in water purified. Name the two sources of these radiations.
