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- Calculate the wavelength radiated by the hot plate at 537 °C. A.5397 nm O B. 3580 nm OC.1556 nm OD.2347 nm O E. 3247 nm1.1) A star has a radius of three times the Sun's radius, and an average number density of ions a factor of 1.75 higher than that of the Sun. How much time does it take on average for photons to travel across this star compared with the Sun?If the radius of a calcium ion is 0.27 nm, how much energy does it take to singly ionize it? Give your answer in electron-volts (eV) with precision 0.1 eV. Give your answer to 2 significant digits.
- 1. We can generalize the Heisenberg Uncertainty principle for position and momentum to in- clude circular motion. If As is the uncertainty in arc length and Ap, is the uncertainty in momentum tangent to the circle, then the circular uncertainty principle is ApsAs > ħ/2. (a) Show that the circular uncertainty principle can be written as ALAO > ħ/2, where AL is the uncertainty in angular momentum and A is the uncertainty in angle. (b) How well can the angular position of the electron be specified in the Bohr atom?A hydrogen atom emits a photon of wavelength 97.41 nm. Based on the Bohr model of the hydrogen atom, what energy level transition does this correspond to? In other words, identify the initial and final values of n. Enter integers for your answers. n₂ = nf =ơ: choice the correct answer 1. If 5000 Joules of energy are released in a 100mA, 1 second exposure, the tube potential is b. 50 KV c. 500 KV d. 5000 KV 2. If the wavelength of green light is 5 x 10ʻ cm, its velocity in a vacuum is a. 3x10* cm/s b. 4.13x10 cm/ s c. 3.14x10* cm/s d. not found a. SKV 3. Which of the following has the least wavelength? a Gamma rays, b. blue light, c infrared radiationd. ultraviolet, radiation 4. the light travel -- path a. rectilinear b. zigzag c. circular d. helical 5. The wavelength of light visible to eye is of the order of a. 10° m b. 10" m c. Im d. 6x10" m
- Coherence Length. Show that light of narrow spectral width has a coherence length l. 12/AX, where AX is the linewidth in wavelength units. Show that for light of broad uniform spectrum extending between the wavelengths Amin and Amax = 2Amin, the coherence length le = Amax.The root mean square speed of the hydrogen molecules at temperature t °C is given by 3x8.31 x (t+273) m 2 x 10-3 Calculate the de Broglie wavelength (in nanometers) of the hydrogen molecules at temperature 24 °C. The mass of the hydrogen molecule is 2 x 1.66 x 10-27 kg. Use two decimals in your answer.False A Si photo-detector has a length of L= 10 um and a hole lifetime of t, =1x 10° s. If a voltage of 5 V is applied across the detector length, the detector gain "G" at the applied voltage will be: %3D Select one: O A. Gph = 2.925 B. Gph = 25.000 C. Gph = 4.000 %3! D. Gph = 10.000 %3D E. Gph = 1.250
- Part A Applying the Bohr model to a triply ionized beryllium atom (Be³+, Z = 4), find the shortest wavelength of the Lyman series for Be³+. Express your answer using four significant figures. ΠΫΠΙ ΑΣΦ λ = Submit Request Answer Part B |AE| = Applying the Bohr model to a triply ionized beryllium atom (Be³+, Z = 4), find the ionization energy required to remove the final electron in Be³+. Express your answer using three significant figures. 5 ΑΣΦ Submit ? Request Answer nm ? eVA tungesten filament is heated to 2600.0 ∘C. Calculate the wavelength for which the emission spectrum of the filament is maximum assuming that it fully absorbes light at all wavelengths. Choose: a.λmax=1009 b.λmax=1115 c.λmax=1137 d.λmax=1087An electron is located on a pinpoint having a diameter of 2.84 µm. What is the minimum uncertainty in the speed of the electron? m/s