Basic Concepts of Physics
Why does a green cucumber appear green?
It gives off green particles, which enter your eyes.
Green particles are attracted to it.
It absorbs all colors except for green, so you only see green
None of these
It absorbs all colors except for green, so you only see green
A green cucumber appears green because it absorbs all colors of light in the visible spectrum except for green. The green color you see is the result of green wavelengths of light being reflected off the cucumber and entering your eyes. So, the correct explanation is: “It absorbs all colors except for green, so you only see green.”
It absorbs all colors except for green, so you only see green A green cucumber appears green because it absorbs all colors of light in the visible spectrum except for green. The green color you see is the result of green wavelengths of light being reflected off the cucumber and entering your eyes. So, the correct explanation is: “It absorbs all colors except for green, so you only see green.”
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What Greek letter is used to denote frequency?A. Lambda
B. Nu
C. Phi
D. Kappa
The restoring force is always directed towards the
A. Initial position
B. Final positions
C. Rest position or mean position
D. All of these
What type of EM radiation gives people tans?
A. Gamma
B. infrared
C. Ultraviolet
D. visible
The wire of an electric lamp has a
A. High resistance and a high melting point
B. High resistance and a low melting point
C. Low resistance and a low melting point
D. Low resistance
In which process, the photon emits to produce laser beam
A. Induced absorption
B. Spontaneous emission
C. Induced emission
D. All of these
A specific mass of pure water is frozen to form completely transparent ice, in the shape of a lens. When forced underwater, the lens diverges light. What is the shape of the lens?
A. Concave lens
B. Convexo-concave lens
C. Cylindrical lens
D. Convex lens
The ratio of the velocity of the body to the velocity of the sound is called
A. Magic number
B. Replace number
C. Natural number
D. Match number
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