Physics Ray Optics Level: High School
Ray Optics
Information is encoded on an electromagnetic wave by modulating the amplitude . As the wave propagates through a dispersive medium , is the velocity of the information given by the group velocity . Phase velocity or the speed of light ? Does it matter if the information is digital or analogue ?Physics Ray Optics Level: High School
Ray Optics
A pulse of light has a gaussian shape in time with a band width of 3 GHz centered at a wavelength of 1 = 1.55 micro m . Does this pulse travel through a block of glass with a velocity determined by :(a) the group velocity
(b) the phase velocity
(c) the speed light of vacuum ?
Explain how ?Physics Ray Optics Level: High School
Ray Optics
When the light from an infrared laser (wavelength = 1560 nm ) travels from one medium with an index of refraction of n1 = 1.45 (glass) into a second medium with an index of refraction of n2 = 1.32 (water) .(i) only the frequency changes
(ii) only the wavelength changes
(iii)both the frequency and the wavelength change , and / or .
(iv)the frequency and the wavelength both remain the same . Explain
Physics Ray Optics Level: High School
Ray Optics
A few years ago , Cadillac announced the use red LEDs (wavelength 680 nm) instead of conventional bulbs with filaments for brake lights . The manufacturer claimed that because of their faster turn-on time , the stopping distance of a car following this new Cadillac could be reduced by up to 17 feet at 60 miles/hour . If this is so , what is the difference in the turn on time between the LED and the incandescent bulb that it replaces ?
Physics Ray Optics Level: High School
Ray Optics
How far does a plane wave with a free space wavelength of 980 nm travel in one nanosecond in a material with an index of refraction of 1.5 ?
Physics Ray Optics Level: High School
Ray Optics
The left face of a biconvex lens has a radius of curvature of 12.0 cm . and the right face has a radius of curvature of 18.0 cm . The index of refraction of the glass is 1.44(a) Calculate the focal length of the lens
(b) Calculate the focal length if the radii of curvature of the two faces are interchanged .
Physics Ray Optics Level: High School
Ray Optics
A submarine is 300 m horizontally out from the shore and 100m beneath the surface of the water . A laser beam is sent from the sub so that it strikes the surface of the water at a point 210 m from the shore . If the beam just strikes the top of a building standing directly at the water’s edge , find the height of the building .
Physics Ray Optics Level: High School
Wave Optics
In a Young’s double-slit experiment , a set of parallel slits with a separation of 0.100 mm is illuminated by light having a wavelength of 589 nm and the interference pattern observed on a screen 4.00 m from the slits .(a) What is the difference in path lengths from each of the slits to the screen location of a third-order bright fringe ?
(b) What is the difference in path lengths from the two slits to the screen location of the third dark fringe away from the center of the pattern ?
Physics Ray Optics Level: High School
Wave Optics
White light is spread out into its spectral components by a diffraction grating . If the grating has 2000 lines per centimeter , at what angle does red light of wavelength 640 nm appear in the first–order spectrum ?
Physics Ray Optics Level: High School
Wave Optics
At what angle above the horizon is the Sun if light from it is completely polarized upon reflection from water ?
Physics Ray Optics Level: High School
Ray Optics
As per the figure at “click here” give a geometric proof that the virtual image formed by a plane mirror is the same distance behind the mirror as the object is in front of it .
Physics Ray Optics Level: High School
Ray Optics
An object’s distance from a converging lens is ten times the focal length . How far is the image from the local point ? Express the answer as a fraction of the focal length .
Physics Ray Optics Level: High School
Ray Optics
In a church choir loft , two parallel walls are 5.30 m apart . The singers stand against the north wall . The organist faces the south wall , sitting 0.800m away from it . So that she can see the choir , a flat mirror 0.600 m wide is mounted on the south wall , straight in front of the organist . What width of the north wall can she see ?
Physics Ray Optics Level: High School
Ray Optics
Light is incident normally on a 1.00cm layer of water that lies on top of a flat Lucite plate with a thickness of 0.500cm . How much more time is required for light to pass through this double layer than is required to traverse the same distance in air (nLucite = 1.59) ?
Physics Ray Optics Level: High School
Ray Optics
A certain kind of glass has an index of refraction of 1.650 for blue light of wavelength 430 nm and an index of 1.615 for red light of wavelength 680 nm . If a beam containing these two colors is incident at an angle of 30degree on a piece of this glass , what is the angle between the two beams inside the glass ?