State how to draw the three rays for finding the image position due to a thin lens

What will be an ideal response?


Ray 1 leaves the top of the object and is drawn such that it is parallel to the axis; therefore it emerges from the lens along a line through the focal point on the back side of the lens.
Ray 2 leaves the top of the object and is made to pass through the other focal point; therefore it emerges from the lens parallel to the axis.
Ray 3 leaves the top of the object and is directed toward the very center of the lens; therefore it emerges from the lens at the same angle as it entered.

Physics & Space Science

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How does surface tension affect heat pipe performance?

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The principle of conservation of energy states that if the total mechanical energy is a constant then

A. the momentum is always a constant B. no work is done on a system by any nonconservative forces C. no work is done on a system by any forces D. work is done on a system in order to conserve energy

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In beta decay,

A) a neutron turns into a proton B) a helium nucleus is ejected C) a proton turns into an electron D) a proton turns into a neutron

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What happens to a given mass of water as it is cooled from 4°C to zero?

a. expands b. contracts c. vaporizes d. Neither expands, contracts, nor vaporizes.

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