A diffraction grating is to be used to find the wavelength of the emission spectrum of a gas
The grating spacing is not known, but light of a known wavelength of 632.8 nm is deflected by 43.2° in the second order by this grating. Light of the wavelength to be measured is deflected by 34.9° in the second order. What is the wavelength of the light that is to be measured?
529 nm
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Fill in the blank(s) with correct word
Why might the presence of a giant planet be both good and bad for life on a terrestrial planet in another solar system?
What will be an ideal response?
An instructor fires an arrow into a wooden block suspended by strings, as shown. If the mass of the arrow is 1/10 the mass of the block, what is the momentum of the arrow relative to the momentum of the block after the arrow has fully penetrated the block and is moving with it?
a. The same. b. The momentum of the arrow is 1/10 that of the block. c. The momentum of the arrow is ten times that of the block. d. The momentum of the arrow is 100 times that of the block because the kinetic energy is ½mv2. e. The momentum of the arrow is 1/100 times that of the block because the kinetic energy is ½mv2.
The axis of a long hollow metallic cylinder (inner radius = 1.0 cm, outer radius = 2.0 cm) coincides with a long wire. The wire has a linear charge density of ?8.0 pC/m, and the cylinder has a net charge per unit length of ?4.0 pC/m. Determine the magnitude of the electric field 3.0 cm from the axis
a. 5.4 N/C b. 7.2 N/C c. 4.3 N/C d. 3.6 N/C e. 2.4 N/C