During quarantine, a student has been looking at a red light (frequency: 4×1014 Hz) for the past 10 minutes and wants to calculate out what is the wavelength?
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During quarantine, a student has been looking at a red light (frequency: 4×1014 Hz) for the past 10 minutes and wants to calculate out what is the wavelength?
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- The photoelectric effect can be used in engineering designs for practical applications. For example, infrared goggles used in night-vision applications have materials that give an electrical signal with exposure to the relatively long wavelength of IR light. If the energy needed for signal generation is 7.5 x 10-20 J, what is the minimum wavelength? What is the frequency of light that can be detected? c = 2.998 x 10 m/s h = 6.626 x 10-34 J s mA distant star emits maximum intensity for wavelength 850 What is its radiant A nm. intensity? O7.7 x 10 6W/m² O 1.9 x 10 4W/m2 O 1.9 x 10 -4W/m² 7.7 × 10 ³W/m2Scientists 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
- The photoelectric effect can be used in engineering designs for practical applications. For example, infrared goggles used in night-vision applications have materials that give an electrical signal with exposure to the relatively long wavelength of IR light. If the energy needed for signal generation is 6.4 x 10-20 J, what is the minimum wavelength? What is the frequency of light that can be detected? c = 2.998 x 10° m/s h = 6.626 x 10-34 J s s-1 Submit Answer Retry Entire Group No more group attempts remainX-rays have a wavelength small enough to image individual atoms, but are challenging to detect because of their typical frequency. Suppose an X-ray camera uses X-rays with a wavelength of 3.10 nm. Calculate the frequency of the X-rays. Be sure your answer has the correct number of significant digits.ultraviolet radiation becomes more dangerous as the wavelength decreases. the ultraviolet radiation with the smallest wavelength is uvc radiation and it can break chemical bonds and produce permenant damage to dna. at its most dangerous uvc radiation has a wavelength of 1.0 x 10^-7 and a frequency of 3.0 x 10^15 hz. whats the velocity of the radiation at its most dangerous
- Zara and Chloe want to build a chamber that is of the following dimensions: 20cm(length) x 10cm(width) x 5cm(height). They are looking to buy a UV-C lamp capable of disinfecting their medical instruments, the bulb needs to be able to produce around the wavelengths of 254 nm. Considering the area within the box what wattage does the bulb need to be to effectively disinfect and sterilize their instruments.(a) A moving neutron has a wavelength of 5.29 x 10-/ m. What is its speed (in m/s)? m/s (b) A neutron moves with a speed of 8.30 x 10° m/s. What is its wavelength (in m)? mLight with a wavelength of 571 nm is in the visible part of the electromagnetic spectrum. What is the numerical value of the exponent p if 571 nm = 571 x 10² cm? p= Report your numerical answer below, assuming three significant figures.
- Radiation from a distant neutron star is found by a satellite far from Earth to have wavelength λ = 3 nm. a) What is the ratio δλ/λ, where δλ is the difference with respect to the measurement by a detector on the surface of the Earth? The Schwarzschild radius of the Earth is 8.7 mm, while its actual radius is 6.4 × 106 m. b) What is the ratio δ′ λ/λ, where δ′ λ is the difference with respect to the wavelength of the same radiation at the time of emission from the neutron star’s surface? Assume that the neutron star’s actual radius is three times its (typically 4 km) Schwarzschild radius.An isotropic point source emits light at wavelength 500 nm, at the rate of 50 W. A light detector is positioned 200 m from the source. What is the maximum rate dB/dt at which the magnetic component of the light changes with time at the detector's location? 5.0x10*6 tesla/s 5.0x10^6 gauss/s 6.88x10*6 tesla/s 2.0x10^6 tesla/s 6.88x10*6 gauss/s 3.44x10^6 tesla/s 3.44x10*6 gauss/s 2.0x10^6 gauss/s None of them 1.72x10^6 tesla/s O 1.72x10^6 gauss/sThe wavelength of the yellow-orange light from sodium-vapor streetlights is 589nm. What is its wavelength in units of mm?