Intensity is a measure of incoming power per unit area. If el is the intensity of the incoming energy within an illuminated region of area, A, then the total received power is given by: P = JA where I depends on the power of the radiating source, how it spreads and how far away it is from the illuminated region. shlight on a Wall Suppose that a flashlight beam spreads uniformly over a circular region as shown in the figure above. (a) If Pbulb is the radiated power, and r is the radius of the circle, which expression gives the intensity, , within the illuminated region? Pbulb 4tr² Pbulb Пре Pbulb 2πr (b) Which expression should you use to calculate the total incoming (received) power, Pin, over a square of side length, s, that is completely illuminated by the beam as shown in the above figure? O shel 0 Hrael Ο Ampel 8 You shine the 13.5-cm radius circular beam of a 70-W flashlight on a square sticky-note with side length 8.1-cm that is tacked to a nearby wall as shown in the figure above. (c) What is the total (average) power received across the circular beam. W (d) What is the total (average) power received across a sticky note? W (d) What is the intensity of the incident light on the sticky note? W/m² Area, A Intensity. I

At what fraction of the speed of light is an electromagnetic wave traveling if it has a maximum electric field strength of 7.4 kV/m and a maximum magnetic field strength of 55.9 µT? Enter your answer as the decimal you would multiply the speed of light (c) by to get your answer (i.e., if your answer was O.XYc, you would enter 0.XY).

Taverage = 288 degrees kelvin Source_ ase.tufts.edu Q12 Estimate dmaxjatensity, based on Earth's surface temperature using Wien's Law in Figure 1-3. dmax jntensity = Q13 Estimate kmax iuteusiy, based on Earth's surface temperature using Wien's Law kmax iutensity =. Q14 What region of the EM spectrum does Amax intensity, emitted by Earth, belong to? Aside: Can the human eye detect this radiation?

A traveling electromagnetic wave in a vacuum has an rms electric field amplitude of 59.7 V/m. Calculate the intensity S of this wave. Also, s circular, parallel plate capacitor in a DC RC circuit is charging. What is the direction of the Poynting vector between the capacitor plates? A picture of this set up is shown below. Make sure to answer both parts of the questions and show all work.

MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A pulsar is a type of rotating neutron star that emits a beam of electromagnetic radiation. Imagine a pulsar that is moving toward Earth at a speed of 856.500 km/s. It emits mostly radio waves with a wavelength (at the source) of 132.500 cm. What is the observed wavelength of this radiation on Earth? (Assume the Earth is stationary. Consider the speed of light c = 3.00000 × 108 m/s. Give your answer to at least six significant figures.) 4.0 133 What relationship describes the frequency of a wave for an observer that is moving relative to the source? What is the relationship between frequency and wavelength? cm

I Review I Constants I Periodic Table A radio antenna broadcasts a 1.0 MHz radio wave with 20 kW of power. Assume that the radiation is emitted uniformly in all directions. Part A What is the wave's intensity 35 km from the antenna? Express your answer in watts per meter squared.

Our sun's 5800 K surface temperature gives a peak wavelength in the middle of the visible spectrum. Part A What is the minimum surface temperature for a star whose emission peaks at some wavelength less than 400 nm− that is, in the ultraviolet?

Can you answer question 1 part a?

In problem 13, solve for the Hall voltage (in microVolts) that would be generated if 8.1 Amperes of current are used to probe the material. 5 sig figs

Don't use chatgpt will upvote and provide solution in Handwritten form neat and clean and please be quick as soon as possible