A certain type of laser emits light that has a frequency of 7.0 × 10¹4 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 4.1 × 10-¹1 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water. The frequency of the light remains the same, but the speed of the light slows down to 2.3 x 108 m/s. How many wavelengths are there now in one pulse?

A certain type of laser emits light that has a frequency of 7.0 × 10¹4 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 4.1 × 10-¹1 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water. The frequency of the light remains the same, but the speed of the light slows down to 2.3 x 108 m/s. How many wavelengths are there now in one pulse?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter39: Relativity

Section: Chapter Questions

Problem 59PQ

See similar textbooks

Similar questions

Scientists are working on a new technique to kill cancer cells by zapping them with ultrahigh-energy (in the range of 1.00×1012 W) pulses of light that last for an extremely short time (a few nanoseconds). These short pulses scramble the interior of a cell without causing it to explode, as long pulses would do. We can model a typical such cell as a disk 5.00 μm in diameter, with the pulse lasting for 4.00 ns with an average power of 2.00×1012 W. We shall assume that the energy is spread uniformly over the faces of 100 cells for each pulse. I 1.00×1021 W/m² Submit Previous Answers Part C Correct What is the maximum value of the electric field in the pulse? ΜΕ ΑΣΦ Emax Submit Request Answer Part D ? V/m What is the maximum value of the magnetic field in the pulse? ΜΕ ΑΣΦ Bmax = Submit Request Answer ? T
A certain type of laser emits light that has a frequency of 5.0 × 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.9 × 1011s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water. The frequency of the light remains the same, but the speed of the light slows down to 2.3x 10% m/s. How many wavelengths are there now in one pulse?
Many varieties of lasers emit light in the form of pulses rather than a steady beam. A tellurium–sapphire laser can produce light at a wavelength of 800 nm in ultrashort pulses that last only 4.00 x 10-15 s (4.00 femtoseconds, or 4.00 fs). The energy in a single pulse produced by one such laser is 2.00 µJ = 2.00 x 10-6 J, and the pulses propagate in the positive x-direction. Find (a) the frequency of the light; (b) the energy and minimum energy uncertainty of a single photon in the pulse; (c) the minimum frequency uncertainty of the light in the pulse; (d) the spatial length of the pulse, in meters and as a multiple of the wavelength; (e) the momentum and minimum momentum uncertainty of a single photon in the pulse; and (f) the approximate number of photons in the pulse
A certain type of laser emits light that has a frequency of 5.5 × 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 3.7 × 10-11 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water. The frequency of the light remains the same, but the speed of the light slows down to 2.3 x 108 m/s. How many wavelengths are there now in one pulse? = (a)N Number i Units = (b)N Number i Units >
A certain type of laser emits light that has a frequency of 5.6 × 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 4.9 × 10-11 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water. The frequency of the light remains the same, but the speed of the light slows down to 2.3 x 108 m/s. How many wavelengths are there now in one pulse?
When high-energy charged particles move through a transparent medium with a speed greater than the speed of light in that medium, a shock wave, or bow wave, of light is produced. This phenomenon is called the Cerenkov effect. When a nuclear reactor is shielded by a large pool of water, Cerenkov radiation can be seen as a blue glow in the vicinity of the reactor core due to high-speed electrons moving through the water as shown. In a particular case, the Cerenkov radiation produces a wave front with an apex half-angle of 53.0°. Calculate the speed of the electrons in the water. The speed of light in water is 2.25 × 108 m/s.
Two astronauts are 1.60 m apart in their spaceship. One speaks to the other. The conversation is transmitted to earth via electromagnetic waves. The time it takes for sound waves to travel at 343 m/s through the air between the astronauts equals the time it takes for the electromagnetic waves to travel to the earth. How far away from the earth is the spaceship? Number 750 Units W/m^2
A certain type of laser emits light that has a frequency of 5.4 x 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 3.0 x 10-11 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water. The frequency of the light remains the same, but the speed of the light slows down to 2.3 x 10 m/s. How many wavelengths are there now in one pulse? (a)N Number i ! Units This answer has no units (b)N-Number 16201 Units This answer has no units
A distant galaxy emits light that has a wavelength of 711.2 nm. On earth, the wavelength of this light is measured to be 714.9 nm. (a) Decide whether this galaxy is approaching or receding from the earth. (b) Find the speed of the galaxy relative to the earth. (Give your answer to 4 significant digits. Use 2.998 × 108 m/s as the speed of light.) (a) The galaxy is receding (b) Number i 2.2541 x 10^6 ✓from the earth. Units m/s
A certain type of laser emits light that has a frequency of 5.0 x 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 4.4 x 10-11 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water. The frequency of the light remains the same, but the speed of the light slows down to 2.3 x 108 m/s. How many wavelengths are there now in one pulse? (a)N Number i Units (b)N Number i Units
A vertically pulsed laser fires a 1100 MW pulse of 240 ns duration at a small 8 mg pellet at rest. The pulse hits the mass squarely in the center of its bottom side. The speed of light is 3 x 10 m/s and the acceleration of gravity is 9.8 m/s2. T is the time to reach its maximum height h ↑ h t 8 mg + 1100 MW 240 ns If the radiation is completely absorbed without other effects, what is the maximum height the mass reaches? Answer in units of µm.
A distant galaxy emits light that has a wavelength of 638.3 nm. On earth, the wavelength of this light is measured to be 639.7 nm. (a) Decide whether this galaxy is approaching or receding from the earth. (b) Find the speed of the galaxy relative to the earth. (Give your answer to 4 significant digits. Use 2.998 × 108 m/s as the speed of light.) (a) The galaxy is (b) Number i from the earth. Units SUPPORT