Physics
Which one of the following instruments is used to study dispersion of light ?

Telescope
Microscope
Photometer
Spectrometer

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Physics
A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?

The liquid surface falls down only at the center of the tank
The liquid surface falls down on the direction of motion and rises up on the back side of the tank
The surface of the liquid remains horizontal
None

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Physics
A standing wave occurs when

The amplitude of a wave exceeds its wavelength
Two waves overlap
The speed of the wave is zero or near zero
A wave reflects upon itself

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