A beam of laser light is
a. neither monochromatic nor coherent.
b. monochromatic but not coherent.
c. coherent but not monochromatic.
d. both monochromatic and coherent.
Question 2
A 5-turn square loop (10 cm along a side, resistance = 4.0 ) is placed in a magnetic field that makes an angle of 30 with the plane of the loop. The magnitude of this field varies with time according to B = 0.50t2, where t is measured in s and B in T. What is the induced current in the coil at t = 4.0 s?
a. 25 mA
b. 5.0 mA
c. 13 mA
d. 43 mA
e. 50 mA
(A) Scratch test; patient is exposed to allergens through a light scratch on the skin; (B) Positive
Kinetic light sculptures
effect of light on plant
The biochemical reactions of near-infrared light
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