Concept explainers
You are working as a demonstration assistant for a physics professor. For an upcoming lecture on diffraction gratings, he wishes to perform a demonstration where he shines a laser pointer at normal incidence onto the recorded surface of a DVD that is laying flat on the demonstration table. (a) He asks you to determine how many additional maxima beyond the normal reflection (which will be blocked by his hand holding the laser pointer) will be projected onto the ceiling or walls of the room if he uses a laser pointer with a wavelength of 632.8 nm. (b) He also asks you if he can show more maxima by using a laser pointer of another visible color. The tracks of pits on a DVD are separated by 0.800 μm.
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Chapter 37 Solutions
Physics for Scientists and Engineers with Modern Physics
- An optic fiber is a clear solid tube designed to transmit light pulses in a particular direction. To minimize losses, you want light hitting the inside surface of the tube to reflect for as large a range of angles as possible. Should the index of refraction of the fiber be large or small? Why?arrow_forwardYou are working as a demonstration assistant for a physics professor. For an upcoming lecture on diffraction gratings, he wishes to perform a demonstration where he shines a laser pointer at normal incidence onto the recorded surface of a DVD that is laying flat on the demonstration table. (a) He asks you to determine how many additional maxima beyondthe normal reflection (which will be blocked by his hand holding the laser pointer) will be projected onto the ceiling or walls of the room if he uses a laser pointer with a wavelength of 632.8 nm. (b) He also asks you if he can show more maxima by using a laser pointer of another visible color. Thetracks of pits on a DVD are separated by 0.800 μm.arrow_forwardLight enters from air into glass (dark blue) with an index of refraction of ng = 1.774 , which is surrounded by a plastic (light blue) with np = 1.427. What is the critical angle (in degrees) for total internal reflection at the glass - plastic interface?arrow_forward
- A light wave is incident within glass of refractive index nG = 1.50 onto a boundary with water of refactive index nW = 1.33. Calculate the critical angle of incidence in the glass, above which total internal reflection occurs.arrow_forwardThe index of refraction for red (660 nm) and green (550 nm) light respectively in polystyrene is 1.488 and 1.493. By how much do the critical angles for red and green light differ in polystyrene surrounded by air?arrow_forwardA camera lens with index of refraction greater than 1.30 is coated with a thin transparent film of index of refraction 1.25 to eliminate by interference the reflection of light at wavelength l that is incident perpendicularly on the lens. What multiple of l gives the minimum film thickness needed?arrow_forward
- For a first order diffraction line obtained by irradiating an echellette grating containing 1320 blazes/mm with an angle of incidence of polychromatic radiation of 32 degrees to the grating normal, the wavelength of radiation that would appear at an angle of reflection of 15 degrees isarrow_forwardTwo polarizing sheets P1 and P2 are placed together with their transmission axes oriented at an angle to each other. What is when only 25% of the maximum transmitted light intensity passes through them?arrow_forwardAt what angle is light inside crown glass completely polarized when reflected from water, as in a fish tank?arrow_forward
- Light enters a prism of crown glass and refracts at an angle of 5.00 with respect to the normal at the interface. The crown glass has a mean index of refraction of 1.51. It is combined with one flint glass prism (n = 1.65) to produce no net deviation. a. Find the apex angle of the flint glass. b. Assume the index of refraction for violet light (v = 430 nm) is nv = 1.528 and the index of refraction for red light (r = 768 nm) is nr = 1.511 for crown glass. For flint glass using the same wavelengths, nv = 1.665 and nr = 1.645. Find the net dispersion.arrow_forwardAstronomers observe the chromosphere of the Sun with a filter that passes the red hydrogen spectral line of wavelength 656.3 nm, called the H line. The filter consists of a transparent dielectric of thickness d held between two partially aluminized glass plates. The filter is held at a constant temperature. (a) Find the minimum value of d that produces maximum transmission of perpendicular H light if the dielectric has an index of refraction of 1.378. (b) What If? If the temperature of the filter increases above the normal value, increasing its thickness, what happens to the transmitted wavelength? (c) The dielectric will also pass what near-visible wavelength? One of the glass plates is colored red to absorb this light.arrow_forwardWhen light is incident normally on the interface between two transparent optical media, the intensity of the reflected light is given by the expression S1=(n2n1n2+n1)2S1 In this equation, S1 represents the average magnitude of the Poynting vector in the incident light (the incident intensity), S1 is the reflected intensity, and n1 and n2 are the refractive indices of the two media. (a) What fraction of the incident intensity is reflected for 589-nm light normally incident on an interface between air and crown glass? (b) Does it matter in part (a) whether the light is in the air or in the glass as it strikes the interface?arrow_forward
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