6110

Physics Wave Optics Level: Misc Level

A beam of unpolarized light, with intensity 43 W/m2, is sent into a system consisting of two polarizing sheets with polarizing directions at angles 01=73% and 02=90% to the y axis. What is the intensity of the light transmitted by the system?

6107

Physics Wave Optics Level: Misc Level

Suppose a photon collides with a free electron and gives the electron some of its energy, How are the photon,s energy, frequency and wavelength affected by the collision?

6024

Physics Wave Optics Level: Misc Level

How much luminous flux does a 40-cd isotropic point source emit?

6019

Physics Wave Optics Level: Misc Level

A 60 -watt bulb hangs 4 ft directly above a table where a paper is lying. If a 100- watt bulb replaces the 60- watt bulb, how high above the paper must the bulb be placed so that the paper has 3 times the original illuminance? The red light from a helium -neon laser has a wavelength of 633nm. Find the frequency of this light wave.

6018

Physics Wave Optics Level: Misc Level

Two isotropic light sources are 200 cm apart. One has a luminous intensity of cd. A screen is moved along the line connecting the sources. Equal illumination on the two sides of the screen is noticed when the screen is 50 cm from the 30 cd source. What is the luminous intensity of the other source?

6009

Physics Wave Optics Level: Misc Level

The red light from a helium -neon laser has a wavelength of 633 nm.. Find the frequency of this light wave.

5966

Physics Wave Optics Level: Misc Level

Consider an oil film ( n=1.50) on water (n =1.33) and light of wavelength 600nm in air incident on the film .The minimum film thickness for constructive interfence of the light in the air is:

5965

Physics Wave Optics Level: Misc Level

Consider two diffraction gratings with the same slit separation, the only difference being that one grating has 3 slits and the other 4slits. If both gratings are illuminated with a beam of the same monochromatic light.

5961

Physics Wave Optics Level: Misc Level

The index of refraction of diamond is 2.42. This means that a given wavelenght of light travels:

5960

Physics Wave Optics Level: Misc Level

For a beam of light, the direction of polarization is defined as:

5959

Physics Wave Optics Level: Misc Level

Assuming that R is the wavelength of liquid in oil, for an oil film on water, constructive interference occurs with the minimum film thickness of:

5860

Physics Wave Optics Level: Misc Level

The worst thing you can do for a health of a green -leafed plant is to illuminate it with only a. red light b.green c.blue light d. all are equally naughty

5858

Physics Wave Optics Level: Misc Level

The color of an opaque object is the same as the light that is a. transmitted b. absorbed c.reflected d.all of these e. none of these

5857

Physics Wave Optics Level: Misc Level

What is the frequency of an electromagnetic wave that has a wavelenght of 300,000 km? a. less than 1 Hz.b. more than 1 Hz. c, 1 Hz

5849

Physics Wave Optics Level: Misc Level

The dark lines in the Sun ,s spectrum represent light that is a. absorbed by the Sun ,s atomsphere b. emitted by the sun c. not emitted by the sun

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