7588

Physics Wave Optics Level: Misc Level

Coherent light from a laser is split into two beams with intensities I0 and 4I0,respectively.What is the intensity of the light when the beams are recombined?If there is more than one possibility, give the range of possibilities.

7582

Physics Wave Optics Level: Misc Level

A laser beam with wavelength of 632.8 nanometer shines at the normal incidence on the reflective side of a compact disc. The tracks of tiny pits in which information is coded onto the CD are 1.60 micrometer apart. For what angles of reflection (measured from the normal 1) will the intensity of light be maximum?

7581

Physics Wave Optics Level: Misc Level

Diffraction occurs for all types of waves, including sound waves.High frequency sound from a distant source with a wavelength 9.00 cm passes through a narrow slit 12.0 cm wide.A microphone is placed 40.0 cm directly in front of the center of the slit, corresponding to the O in the attachment. The microphone is then moved in a direction perpendicular to the line from the center of the slit to the point O. At what distances from O will the intensity detected by the microphone be zero.

7580

Physics Wave Optics Level: Misc Level

An FM radio station has a frequency of 107.9 MHZ and uses two identical antennas mounted at the same elevation,12.0 m apart. The antennas radiate in phase. The resulting radiation pattern has a maximum intensity along a horizontal line perpendicular to the line joining the antennas and midway between them. Assume that the intensity is observed at distances from the antennas that are much larger than 12.0 m.At what angles (measured from the line of maximum intensity) the intensity is maximum and at what angle is it zero.

7579

Physics Wave Optics Level: Misc Level

Coherent light from a sodium -vapor lamp is passed through a filter that blocks everything except for the light of a single wavelength. It then falls on two slits separated by 0.460 mm.In the resulting interference pattern on a screen 2.20 m away,adjacent bright fringes are separated by 2.82 mm.what is the wavelength?

7245

Physics Wave Optics Level: Misc Level

A glass plate (n=1.60) is covered with a thin, uniform layer of oil (n=1.16).A light beam of variable wavelength from air is incident normally on the oil surface. Observation of the reflected beam shows destructive interference at 450.0 nm and constructive interference at 675.0 nm. From this information, calculate the thickness of the oil film.

7244

Physics Wave Optics Level: Misc Level

A beam containing light of wavelengths lambda1 and lambda2 is incident on a set of parallel slits. Inthe interference pattern,thefourth bright line of the lambda1 light occurs at the same position as the sixth bright line of the lambda2 light. If lambda1 is known to be 554 nm, what is the value of lambda2?

7243

Physics Wave Optics Level: Misc Level

A beam of light of wavelength 562 nm passes through two closely spaced glass plates, as shown in the figure below.For what minimum nonzero value of the plate separation, d, will the transmitted light be bright?

7242

Physics Wave Optics Level: Misc Level

Light of wavelength 489 nm falls on two slits spaced 0.287 mm apart. What is the required distance from the slits to a screen if the spacing between the first and second dark fringes is to be 3.24 mm?

7241

Physics Wave Optics Level: Misc Level

A very thin sheet of plastic (n=1.55) covers one slit of a double-slit apparatus illuminated by 615 nm light. The center point on the screen, instead of being a maximum, is dark. What is the (minimum) thickness of the plastic?

7240

Physics Wave Optics Level: Misc Level

What is the minimum thickness of a soap film (n=1.39) that would appear black if illuminated with 482 nm light?Assume there is air on both sides of the soap film.

7239

Physics Wave Optics Level: Misc Level

How wide is the central diffraction peak on a screen 2.50 m behind a 0.0315 mm wide slit illuminated by 593 nm light?

7238

Physics Wave Optics Level: Misc Level

Monochromatic light falls on two very narrow slits 0.0356 mm apart. Successive fringes on a screen 5.22 m away are 5.68 cm apart near the center of the pattern. What is the wavelength of the light?

7236

Physics Wave Optics Level: Misc Level

A person driving at v=16.6 m/s crosses the line connecting two radio transmitters at right angles, as shown in the figure below.The transmitters emit identical signals in phase with each other, which the driver receives on the car radio. When the car is at point A, L1= 440 m and L2= 141 m away from the transmitters, the radio picks up a maximum net signal. What is the longest possible wavelength of the radio waves?

7117

Physics Wave Optics Level: Misc Level

Wave phenomena Consider waves incident on an obstacle. There will be a significant shadow region if;

a)wavelength>> object size

b)wavelength equal to object size

c) wavelength <<object size

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