An outer surface of a wood burning stove in a cabin is at a temperature of 150
What is the wavelength where the blackbody is a maximum?
A. 3.64 micrometer
B. 4.02 micrometer
C. 4.57 micrometer
D. 5.25 micrometer
E. 6.85 micrometer
E. 6.85 micrometer
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A star radiates most strongly at 400 nm. What is its surface temperature?
A. 483 K B. 7,250 K C. 72,500 K D. 4,830 K
Nonreflective coatings for camera lenses reduce the loss of light at various surfaces of multi-lens systems, as well as preventing internal reflections that might mar the image. Find the minimum thickness of a layer of magnesium fluoride (n = 1.38) on
flint glass (n = 1.66) that will cause destructive interference of reflected light of wavelength l = 550 nm, a wavelength which is near the middle of the visual spectrum.
A cube of wood of density 0.64 g/cm3 is 10 cm on a side. When placed in water, what height of the block will float above the surface? (water density = 1.00 g/cm3)
a. 7.8 cm c. 2.2 cm b. 3.6 cm d. 6.4 cm
At a point in space where the magnetic field is measured, the magnetic field produced by a current element
A. points radially away in the direction from the current element to the point in space. B. points radially in the direction from the point in space towards the current element. C. points in a direction parallel to the current element. D. points in a direction parallel to but opposite in direction to the current element. E. points in a direction that is perpendicular to the current element and perpendicular to the radial direction.