Calculate the critical angle for total internal reflection in a fiber-optic cable made from quartz glass with a coating of polyethylene.
What will be an ideal response?
If the incident angle of the light from normal in the core is ?1 then if the angle from normal in the coating is 90 degrees the light will not enter the coating, rather the light will reflect back into the quartz glass at the angle ?1.
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The sedimentary rock known as ______________ consists of angular pebbles cemented together by silica, calcium carbonate, or iron oxide
a. conglomerate b. breccia c. limestone d. shale
If you draw a spacetime diagram, the worldline of an object that is stationary in your reference frame is
A) vertical. B) horizontal. C) slanted. D) curved. E) a circle.
What makes a reference system "inertial"?
a. Newton's first law applies in that system. b. Newton's second law applies in that system. c. Newton's third law applies in that system. d. Velocities add according to the rules of vector addition in that system. e. Newton's law of gravitation applies in that system.
The acceleration of a cart rolling down an inclined plane (a ramp)
A) is approximately constant. B) increases with time. C) decreases with time.