33. A spherical particle of density p= 5.00- cm? and 2.00 mm radius is located at the same distance from the Sun as the Earth, RSE =1.5 x 1011 m. Nm? G= 6.67 x 10-11 S= 1 365 kg on the particle by the Sun is · Mg = 1.99 x 10" kg. If the particle absorbs 100 percent of the sunlight reaching it, the ratio of the force exerted by the solar radiation to the force of gravity exerted m2 a. 5.8 x 105. b. 0.58. c. 1.0. d. 1.7. e. 1.7 x 104|
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- Which answer is correct? A surface area of a material at an absolute temperature above 0 Kelvin may be called a blackbody radiator if it displays these characteristics: A. Discrete light emission, very high emissivity and black colour. B. Self-luminous, very high emissivity and good reflectivity. C. Self-luminous, very high emissivity and no reflection. D. Self- luminous, very high emissivity and the peak wavelength of emission decreases without bound.A green laser beam with a wavelength l = 532 nm has an energy of 3.85 x 10–3 J per pulse. What is the energy per photon? (h = 6.63 x 10–34J.s; c = 3.00 x 108 m/s; 1 nm = 10–9 m) (A) 3.85 x 10–3 J (B) 3.74 x 10–37 J (C) 3.74 x 10–28 J (D) 3.74 x 10–19 J2.
- 1. The maximum radiance of a blackbody is at wavelength λ = 1.2 µm. a) At what temperature does this occur? b) Estimate the brightness temperature for a grey body at this wavelength if the emissivity coefficient is 0.9. (Use the full formula.) ( hc25. A photon of green light has a wavelength of 520 nm. Calculate the energy of this photon in eV. (Answer: 2.38 eV)25. A photon has a frequency of 1.14 x 10^15 Hz. What is the energy of the photon? Use the formula E = hf, where E is energy in Joules, h is Planck's constant = 6.62 x 10^-34 J/s, and f is frequency (Hz). 5.82 x 10^-49J 8.77 x 10^-16 J 7.55 x 10^-19 J 1.09 x 10^-12 J wwwwww
- The figure below depicts spectral reflectance measurements for three different materials: a green leaf from a healthy plant, a sheet of shiny blue paper, and the palm of a human hand. The measurements are labeled 1 (black line), 2 (red line), and 3 (blue line). Match the measurements to the most appropriate material typeEx / find the wave length make of emission Radiation from. a -Human body when the skin temperature is equal to 35°. b-The tungsten light at 2000 K. c -The sun at 5800 K. [Hint use ( AmT =cons tant = 2.898 x 10 m.K max5. Calculate the total power radiated per unit area by a tungsten filament at a temperature of 3000. K. (Assume that the filament is an ideal radiator.) (b) If the tungsten filament of a lightbulb is rated at 75.0 W, what is the surface area of the filament? (Assume that the main energy loss is due to radiation.)
- F 264hzVisible light falls into wavelength ranges of 400-700 nm, for which 1 m=1×109 nm The energy and wavelength of light are related by the equationE=hcλ where E is energy in Joules, h is Planck's constant ( 6.626×10−34 J-s ), c is the speed of light ( 2.998×108 m/s), and λ is the wavelength in m. If a visible light photon has a wavelength of 632.3 nm, what is the energy of the photon (in J)?65 N 45 P 56 N 30% C 60° 52 N P Pearson