2.35 Consider a lightwave having a phase velocity of 3 x 10 m/s and a frequency of 6 x 10 Hz. What is the shortest distance along the wave between any two points that have a phase difference of 30? What phase shift occurs at a given point in 10 s, and how many waves have passed by in that time?
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- A 2m high water wave travels past an observer. Every 3s he sees 5 full waves pass him. Each peak is 4 m apart. Calculate the: frequency,period,angular velocity,speed of the wave.A police car’s radar gun emits microwaves with a frequency of f1 = 9.20 GHz. The beam reflects from a speeding car, which is moving toward the police car at 36.3 m/s with respect to the police car. The speeder’s radar detector detects the microwave at a frequency f2. Find the frequency difference f2 − f1._____kHzI ran track in high school. Sometimes spectators would time the races from the stands. Let's say that the spectator is a distance, d, from the starter. The spectator (erroneously) starts their timer when they hear the sound from the starting gun. They should start the timer when they see the smoke from the starting gun.Who can calculate the timing error Δt in terms of d, the speed of sound (vs) and the speed of light (c)? I calculated 6.7 x 10^-7, with speed of sound = 343 m/s and speed of light = c. I just wanted to confirm if I was correct. I used x = x0 + 1/2 (v0 +v)(t).
- Assume that when I was 30 years old, I invented a spaceship capable of traveling at 95% of the speed of light, and take off to survey a peculiar infrared star 10 light years from earth. My daughter is 2 years old when I leave earth. I calculate that I age 20 years on my mission. A. while traveling to the star at 95% of the speed of light, I measure the wavelength of its light at 450 nm. What is the actual wavelength of the star's light? B. I turn around and head back to earth at 95% of the speed of light. WHat is the wavelength I see and I move away from the star? C. From my daughter prespective, how old is she when I return?A special black material absorbs all light incident upon it. An intense laser beam shines straight up onto a horizontally flat object made out of this material. If the object has an area of 1.0 m² and a mass of 1.0 kg, how much power does the laser need to generate in order to accelerate it upward at a rate that is two times the freefall acceleration of gravity, 2g?Please solve and answer the question correctly please. Be sure to give the correct units and answers. Thank you!!
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