Problem 1. A digital cell phone emits 0.60Wattsof 1.9GHz= 1.9×109Hzradio waves. (Assume thewaves are passing through air so that their speed is effectively the vacuum speed of light). At a distance of10cm= 0.1mfrom the cell phone, (d.) Considering what you know (intensity, frequency, wavelength), etc. about these EM waves emitted by thecell phone, do you think the EM waves radiating from your phone are capable of causing bodily harm toa cell phone user?

Q: Unpolarized light with an intensity of 98W/m^2 passes through two polarizing filters. If the light…

A: Given:Intensity of unpolarized light, I0 = 98 W/m2Intensity of light emerges from second filter, I'…

Q: Microwaves of wavelength 5.00 cm enter a long, narrow window in a building that is otherwise…

A: The condition for destructive interference is

Q: Light from a red laser pointer (X=660 nm) emerges from a vertical (0°) polarizer with an intensity…

A:

Q: Microwaves of wavelength 5.50 cm enter a long, narrow window in a building that is otherwise…

A: Given: Wavelength of microwave (λ) = 5.0 cm = 5×10-2 m. Width of window = width of slit = (d) = 38.0…

Q: A point source emits light isotropically (i.e. with the same intensity in all directions). Let I be…

A: Given : Luminous intensity at distance d from the source = I To determine : The intensity at…

Q: Coherent microwaves of wavelength 4.00 cm enter a tall, narrow window in a building otherwise…

A: Data Given ,  Wavelength ( λ ) = 4 cm Width of the window ( a ) = 38 cm Order ( m ) = 1st order…

Q: The intensity of light I through a lake at a depth of x meters is given by the following formula.…

A: Given , Intensity of light at depth x meters is given by  dI/dx=(−1.31)I

Q: Ql: A/ In a vacuum, if a light's wavelength is increased by a factor of 10, how does its frequency…

A:

Q: Q.2 (a) Newton's rings are observed in the reflected light of wave length 5900 A. The diameter of 10…

A: Given that, The wavelength of the reflected light, λ=5900 A The diameter of the 10th ring is 0.5 cm…

Q: The light from a mercury lamp is incident on a water film of refractive index 1.33 and thicknesst =…

A: We need to find a relation between wavelength, refractive index and thickness for reflection of…

Q: An unpolarized beam of light (intensity I0) is moving in the x-direction. The light passes through…

A: Expression of the intensity of the light transmitted by the last polarizer. I=I0 cos248°…

Q: A beam of light with wavelength 440 nm in air hits a thin piece of glass 10.28 microns thick (with…

A: Given: Wavelength of light λ=440 nm =440×10-9 m The thickness of the glass piece: t=10.28 microns =…

Q: Sunlight just outside Earth’s atmosphere has an intensity of 1.40 kW/m2. Calculate (a) Em and (b) Bm…

A:

Q: A green laser pointer has a power output of 112 mW. (a) If the laser beam is projected onto a…

A:

Q: Light that passes through a series of three polarizing filters emerges from the third filter…

A: In the given question, We have to calculate the intensity of  initially unpolarized light.

Q: Unpolarized light that has an intensity of lo = 840 W/m is incident on a series of polarizing…

A:

Q: Monochromatic green light of wavelength 550nm illuminates two parallel 1. elits 7.7 u m apart.…

A: Angular position of bright fringe = nλ/d

Q: The wavelength of red helium-neon laser light in air is 632.8 nm. (a) What is its frequency?…

A:

Q: A possible means for making an airplane invisible to radar is to coat the plane with an…

A: The expression for the destructive interference is,

Q: A radar pulse is reflected by an object 50 km away from the receiver. How long would it take for the…

A: Distance b/w receiver & radar, d= 50 km…

Q: Microwaves of wavelength 5.05 cm enter a long, narrow window in a building that is otherwise…

A: Distance of wall from window (D)= 6.4 m Width of window (d) = 37 cm = 0.37 m wavelength (λ) = 5.05…

Q: Some unpolarized light has an intensity of 1415 W/m2 before passing through three polarizing…

A: Given data, Initial intensity Ii=1415 W/m205-3 Angle 1, θ1=24° Angle 2, θ2=46°

Q: Electromagnetic wave of unknown wavelength passes through the slit of width a =3.79 µm and the first…

A: Use diffraction condition and put the values this will give Wavelength of the electromagnetic wave.

Q: The 305 m diameter Arecibo radio telescope detects radio waves with wavelengths from 3 to 100 cm.…

A: Write the expression for the angle between two-point sources and substitute the required values.

Q: During a test, a NATO surveillance radar system, operating at 12 GHz at 180 kW of power, attempts to…

A: Since there are multiple sub parts posted, we will answer the first three sub parts. a)Assume that…

Q: A point source emits light isotropically (i.e. with the same intensity in all directions). Let I be…

A:

Q: A disabled tanker leaks kerosene (n-1.20) into the Persian Gulf, creating a large slick on top of…

A: Givenrefrative index of kerosen nk = 1.2refractive index of water nw = 1.33thick ness of kerosen…

Q: Two radio antennas are separated by 1.60 m. Both broadcast identical 750 MHz waves. If you walk…

A:

Q: 2 If light leaves a material of refractive index 1.45 and crosses an abrupt boundary into a material…

A:

Q: You need to use your cell phone, which broadcasts an 830 MHz signal, but you’re in an alley between…

A: The wave length of the wave is λ=cf=3×108 ms830×106 Hz=0.3614 m Alley between the two massive…

Q: When coherent electromagnetic waves with wavelength λ=120μm are incident on a single slit of width…

A: Given The wavelength of the electromagnetic waves is  λ =120 μm = 120 x 10-6 m. The distance between…

Q: Yellow light has a wavelength l = 590 nm. How many of thesewaves would span the 1.35-mm thickness of…

A: wavelength = 590 nm  distance = 1.35 mm

Q: In the figure, assume two waves of light in air, of wavelength 407 nm, are initially in phase. One…

A:

Q: Tripling the distance from an observer to a point source of light waves will cause the intensity…

A: Introduction: The intensity of the light wave defines the power of the source per unit area at a…

Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.