A lens is coated with material of index of refraction 1.38. What thickness of coating should be used to give maximum transmission at a wavelength of 0.53 ?m?
What will be an ideal response?
96. nm
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What causes auroras?
A. particles from the Sun colliding with and exciting atoms in our upper atmosphere B. waves in the magnetic field creating an upper atmospheric laser-like effect C. micro meteorites burning up as they sweep along Earth's magnetic field D. fluorescence by upper atmospheric hydrogen atoms E. sunlight reflected off meteor dust high in the atmosphere
The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.939 W/m2
The wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. How much total electromagnetic energy falls on the area during 1.0 minute? (c = 3.0 x 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2) A) 210 J B) 170 J C) 340 J D) 250 J E) 300 J
If a transformation from solid to liquid occurs such that the solid and liquid are always in equilibrium, than the transformation is _____________.
Fill in the blank(s) with the appropriate word(s).
The magnitude of a vector is 3.1 units and its x component is 0 units. What are the possible y components and respective angles with the x-axis of the vector?
What will be an ideal response?