Who discovered Uranus?
a. Galileo Galilei
b. William Herschel
c. John Couch Adams
d. Urbain Le Verrier
e. Clyde Tombaugh
b
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Two very flat glass plates, 16 cm long, are in contact at one end and separated by 0.020 mm at the other end. The space between the plates is occupied by oil with index of refraction 1.45. The refractive index of the glass plates is 1.55
The plates are illuminated at normal incidence with monochromatic light, and fringes are observed. When the monochromatic light has a wavelength of 580 nm, how many bright fringes are visible in the pattern? A) 60 B) 70 C) 80 D) 90 E) 100
Of the following which might NOT vanish over one cycle of a cyclic process?
A. the work done by the substance minus the energy absorbed by the substance as heat B. the change in the pressure of the substance C. the energy absorbed by the substance as heat D. the change in the volume of the substance E. the change in the temperature of the substance
At room temperature (20.°C) the area of a hole in a sheet of material is 5.505 cm2. When heated to 830.°C the area increases by 29.0 mm2
(a) What is the thermal coefficient of linear expansion for the material? (b) If the temperature had decreased to -76.° Fahrenheit, what would be the area of the hole?
A gas in a furnace has an extinction coefficient of 0.01m^-1 and a mean beam length of 10 m. What is the transmissivity of radiation through the gas?
What will be an ideal response?