The visible light portion of the electromagnetic spectrum has wavelengths ranging from about 400 to 700 nanometers (nm). Which of the following statements is true?
A) Blue light has wavelength of about 400 nm, red light has wavelength of about 700 nm.
B) Blue light has wavelength of about 700 nm, red light has wavelength of about 400 nm.
C) Blue light and red light can both have wavelengths that may be anywhere between 400 and 700 nm.
D) Blue light and red light both have wavelengths of about 550 nm.
A) Blue light has wavelength of about 400 nm, red light has wavelength of about 700 nm.
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A pn-junction diode at 300 K produces a current density 1.00×104 A/m2 , with a forward bias of 0.10 V. Calculate the current density for a forward bias of 0.300 V.
What will be an ideal response?
A pool ball moving at 3 m/s collides head-on with an identical pool ball that's initially at rest. Just after the collision, the second ball moves away at 2 m/s while the first ball
A) moves at 3 m/s in a direction opposite to the second ball. B) continues moving at 3 m/s in the same direction. C) is at rest. D) moves at 1 m/s in the same direction as the second ball. E) moves at 1 m/s in a direction opposite to the second ball.
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Indicate whether the statement is true or false
Why should galaxy collisions have been more common in the past than they are today?
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