An excited atom can lose energy by emitting an electron.
Indicate whether the statement is true or false
[Ques. 2] A photon is quantum of electromagnetic radiation.
Indicate whether the statement is true or false
[Ques. 3] The photoelectric effect occurs when electrons are emitted when light strikes the surface of a metal.
Indicate whether the statement is true or false
[Ques. 4] A magnifying glass with focal length 15 centimeters is placed 12 centimeters above a stamp. (a) Where is the image? (b) What is the magnification? (c) Is the image produced a real or a virtual image?
[Ques. 5] A movie projector is equipped with a 0.5-meter focal length lens that is positioned 0.506 meters from the film. (a) How far from the lens must the screen be if the image on it is to be in focus? (b) How many times larger is the image than the object? (c) Is the image produced a real or a virtual image?
[Ques. 6] The orientation of an image seen projected on a screen by a single lens is always __________.
Fill in the blank(s) with correct word
[Ques. 7] A __________ lens is thinner at the center than the edges.
Fill in the blank(s) with correct word
[Ques. 8] A __________ lens is thicker at the center than the edges.
Fill in the blank(s) with correct word
[Ques. 9] A person looking through eyeglasses sees __________ images.
Fill in the blank(s) with correct word
[Ques. 10] Image height divided by object height gives __________.
Fill in the blank(s) with correct word
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