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231: According to standard convention, the angles of incidence and reflection for a plane surface are measured from:
w) The reflecting surface
x) Lines at 45 degrees to the reflecting surface
y) A line at 90 degrees to the reflecting surface
z) There is no standard
ANSWER: Y -- A LINE AT 90 DEGREES TO THE REFLECTING SURFACE
232: A real image always appears:
w) Larger than object
x) Inverted
y) Erect
z) Same size as object
ANSWER: X -- INVERTED
233: When light enters an optically denser medium, the light ray:
w) Bends away from a normal to surface
x) Passes through unbent
y) Bends towards a normal to surface
z) None of the above
ANSWER: Y -- BENDS TOWARDS A NORMAL TO SURFACE
234: The speed of light in vacuum "C" divided by the Index of Refraction "N" gives the:
w) Frequency of the light
x) Speed of the light in the medium
y) Energy of the light
z) Wavelength of the light
ANSWER: X -- SPEED OF THE LIGHT IN THE MEDIUM
235: In order for fiber optics to work, the incident light inside the fiber must hit the wall of the fiber at:
w) 90 degrees
x) 45 degrees
y) An angle greater than the critical angle
z) None of the above
ANSWER: Y -- AN ANGLE GREATER THAN THE CRITICAL ANGLE
236: When light is traveling through a vacuum, what is the product of the light's wavelength and frequency equal to?
w) Speed of light
x) Plank's constant
y) Momentum
z) Wave number
ANSWER: W -- SPEED OF LIGHT
237: The inverse of wavelength is referred to as:
w) Wave number
x) Frequency
y) Velocity
z) Momentum
ANSWER: w-- WAVE NUMBER
238: The GeV is a unit of:
w) Momentum
x) Energy
y) Velocity
z) Time
ANSWER: X -- ENERGY
239: In AC Circuit Theory, the term that replaces the resistance is:
w) Inductance
x) Capacitance
y) Impedance
z) Reactance
ANSWER: Y – IMPEDANCE
240: The anti-particle to an electron is:
w) Proton
x) Positron
y) Neutron
z) Anti-proton
ANSWER: X -- POSITRON
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