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☆☆☆☆☆Cards in this guide (9)
Which factor most influences the image produced by reflection of an object in a concave mirror
distance from mirror
Which material lines the tubes of fluorescent lights and glows when exposed to UV light
Phosphor.
Which term indicates the imaginary line that extends straight out from the center of a reflective surface
The imaginary line that extends straight out from the center of a reflective surface is the optical axis.
Which of the following is true of a real image
it can be projected
Which term is used to describe objects that are visible because of reflected light
illuminated
Thats the right answer for a plus.
V-cube 7 or megaminx
megaminx
What is true about convex mirrors
Convex mirrors project a hemispherical surface
Which of the following is true of sound waves
sound waves require a medium to transfer energy
FOR A+ USERS THE ANSWER IS Sound waves travel in all directions
sound waves require a medium to transfer energy
-- They are longitudinal waves and material medium is required for their propagation.
What type of device is used to increase or decrease the voltage of an electric current
The device is called a "variac' and it is a type of transformer. It has a variable voltage ouput.
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