A spaceship moves radially away from Earth with acceleration 29.4 m/s2 (about 3g). How much time does it take for the sodium streetlamps ( 589 nm) on Earth to be invisible (with a powerful telescope) to the human eye of the astronauts? The range of visible wavelengths is about 400 to 700 nm.
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A spaceship moves radially away from Earth with acceleration 29.4 m/s2 (about 3g). How much time does it take for the sodium streetlamps ( 589 nm) on Earth to be invisible (with a powerful telescope) to the human eye of the astronauts? The range of visible wavelengths is about 400 to 700 nm.
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- 2. Two astronauts are 1.20 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 346 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? m.The wavelength of visible light is from, O 400 m to 700 m O 400 km to 700 km O 400 cm to 700 cm O 400 nm to 700 nmWhat is the speed of light traveling from air to a medium of refractive index n=1.5? (Speed of light in vacuum is 3.0 × 108 m/s) O 2.0 × 108 m/s. X O 1.5 × 108 m/s. O 3.0 × 108 m/s. O 0.67 × 108 m/s. O 0.75 × 108 m/s. X C
- A distant galaxy emits light that has a wavelength of 617.7 nm. On earth, the wavelength of this light is measured to be 623.6 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 ◆ from the earth Units ✪6 pls2. A satellite orbiting the Earth is powered by photovoltaic (“solar”) panels that convertlight energy to electricity with a conversion rate of 15.0%. Telemetry from the satelliteindicates that the panels are supplying a peak power output of 3.60 kW, and the specificationsof the panels state that they have 16 m^2 of light-collecting surface area. The radius of theSun and its distance from Earth have long been known to be 6.96 ×10^8 m and 1.50 ×10^11m, respectively. Assume the Sun radiates approximately as a blackbody and calculate thesurface temperature of the Sun.
- how would you solve this? Light is emitted from the light source, reflects from mirror surface X to the plane mirror, and then to the position of surface Z. By the time the light moves from the X to Z position, mirror surface X will have moved to the position of mirror surface Z. The light then continues to the observer. The distances from the light source and the observer to the rotating mirrors are negligible. The distance from the rotating mirrors to the plane mirror is 35.0 km.If the mirrors are rotating at 480 rev/s, the speed of light calculated from the given information is a 7.44 10–9 m/s b 1.34 108 m/s c 2.98 10–8 m/s d 3.36 107 m/snd Mastering I Course Home /course.html?courseld=166729318&LOpenVellumHMAC=5bf0b8048e20e3d1e4690ab70aab89c6#10001 line O BJC VPN New Tab 国Re Physics I Summer 2021 Hi, Danielle v Sign Out Course Home Provide Feedback 8:17 AM 4 s/23/2021 NON- FOLLOW ME DESKTOPThe compound eyes of bees and other in- sects are highly sensitive to light in the ultra- violet portion of the spectrum, particularly light with frequencies between 7.5 × 10¹4 Hz and 1.0 x 10¹5 Hz. The speed of light is 3 × 108 m/s. What is the largest wavelength to which these frequencies correspond? Answer in units of m. What is the smallest wavelength? Answer in units of m.