In Fig. 35-31, a light wave along ray r 1 reflects once from a mirror and a light wave along ray r 2 reflects twice from that same mirror and once from a tiny mirror at distance L from the bigger mirror. (Neglect the slight tilt of the rays.) The waves have wavelength 620 nm and are initially in phase. (a) What is the smallest value of L that puts the final light waves exactly out of phase? (b) With the tiny mirror initially at that value of L , how far must it be moved away from the bigger mirror to again put the final waves out of phase? Figure 35-31 Problems 1 and 2.
In Fig. 35-31, a light wave along ray r 1 reflects once from a mirror and a light wave along ray r 2 reflects twice from that same mirror and once from a tiny mirror at distance L from the bigger mirror. (Neglect the slight tilt of the rays.) The waves have wavelength 620 nm and are initially in phase. (a) What is the smallest value of L that puts the final light waves exactly out of phase? (b) With the tiny mirror initially at that value of L , how far must it be moved away from the bigger mirror to again put the final waves out of phase? Figure 35-31 Problems 1 and 2.
In Fig. 35-31, a light wave along ray r1 reflects once from a mirror and a light wave along ray r2 reflects twice from that same mirror and once from a tiny mirror at distance L from the bigger mirror. (Neglect the slight tilt of the rays.) The waves have wavelength 620 nm and are initially in phase. (a) What is the smallest value of L that puts the final light waves exactly out of phase? (b) With the tiny mirror initially at that value of L, how far must it be moved away from the bigger mirror to again put the final waves out of phase?
www In Fig. 35-48,
an airtight chamber of length d
5.0 cm is placed in one of the arms
of a Michelson interferometer. (The
glass window on each end of the cham-
ber has negligible thickness.) Light of
wavelength A = 500 nm is used.
Evacuating the air from the chamber
causes a shift of 60 bright fringes. From
these data and to six significant figures,
81 SSM
Mirror
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Source
Mirror
To vacuum
find the index of refraction of air at
pump
atmospheric pressure.
(c) The electric fields from two e/m waves are described by E1 = 10.0 cos(kr – wt) N/C and
E2 = 15.0 cos(kr – wt + 60°) N/C. What is the phase of the resultant electric field (in degrees)?
(d) Electrons moving at a speed of 30 m/s pass through a single slit of diameter 8.5 x 10-5 m. A
diffraction pattern forms, due to the wave nature of the electrons. At what angle (in degrees) is the
first-order minimum of this pattern located?
(e) A neutron (with mass m, = 939.566 MeV/c²) is confined inside a nucleus of the most common isotop
of iron, Fe. Assume the nucleus is spherical, and that the uncertainty in the position of the neutron is
the diameter, not the radius, of the nucleus. What is the minimum uncertainty in the velocity of the
neutron, in m/s?
In the figure, a light wave along ray r, reflects once from a mirror and a light wave along ray ro reflects twice from that same mirror
and once from a tiny mirror at distance L from the bigger mirror. (Neglect the slight tilt of the rays.) The waves have wavelength 616
nm and are initially exactly out of phase. What are the (a) smallest, (b) second smallest, and (c) third smallest values of L that result in
the final waves being exactly in phase?
(a) Number
308
Units
This answer has no units
(b) Number
616
Units
This answer has no units
(c) Number
924
Units
This answer has no units
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