BackUnpolarized light of initial intensity passes through two ideal polarizers. The transmission axis of the first polarizer is vertical, and the second is oriented at an angle with respect to the vertical. What is the intensity of the light after passing through both polarizers?
Which best describes how wave ntensity and oudness are typically related?
Which term describes the height of a sound wave?
How does increasing the amplitude of a sound wave affect the volume (loudness) of the sound?
Which of the following changes would result in an increase in (wave intensity)?
Which property of a light wave determines its brightness?
A sound source radiates sound waves in all directions. At a distance of 4 m from the source, you measure the wave intensity to be 0.06 W/m2. How much sound energy does the source emit in 1 hour if the power output is constant?
You measure the intensity from a sound source to be 0.3 W/m2 at a distance of 3.4 m. What will the intensity be if you walk closer to the source, to a distance of 2.5 m?
Two earthquake waves of the same frequency travel through the same portion of the Earth, but one is carrying 3.5 times the energy. What is the ratio of the amplitudes of the two waves?
What is the ratio of the intensities, of an earthquake P wave passing through the Earth and detected at two points 15 km and 55 km from the source?
(II) What is the ratio of the amplitudes of an earthquake P wave passing through the Earth and detected at two points 15 km and 55 km from the source?
A bug on the surface of a pond is observed to move up and down a total vertical distance of 0.10 m, lowest to highest point, as a wave passes. What is the amplitude of the wave?
A bug on the surface of a pond is observed to move up and down a total vertical distance of 0.10 m, lowest to highest point, as a wave passes. If the amplitude increases to 0.15 m, by what factor does the bug’s maximum kinetic energy change?
An earthquake-produced surface wave can be approximated by a sinusoidal transverse wave. Assuming a frequency of 0.60 Hz (typical of earthquakes, which actually include a mixture of frequencies), what amplitude is needed so that objects begin to leave contact with the ground? [Hint: Set the acceleration a > g. Why?]-
Energy Output. By measurement you determine that sound waves are spreading out equally in all directions from a point source and that the intensity is 0.026 W/m2 at a distance of 4.3 m from the source. How much sound energy does the source emit in one hour if its power output remains constant?