A radiometer has two square vanes (1.0 cm by 1.0 cm), attached to a light horizontal cross arm, and pivoted about a vertical axis through the center, as shown in the figure. The center of each vane is 6.0 cm from the axis.
One vane is silvered and it reflects all radiant energy incident upon it. The other vane is blackened and it absorbs all incident radiant energy. An electromagnetic wave with an intensity of 0.30 kW/m2 is incident normally upon the vanes. What is the radiation pressure on the blackened vane? (c = 3.00 108 m/s,
0 = 4 10-7 T m/A, 0 = 8.85 10-12 C2/N m2)
A) 1.0 10-10 Pa
B) 1.0 10-9 Pa
C) 1.0 10-8 Pa
D) 1.0 10-7 Pa
E) 1.0 10-6 Pa
Question 2
A radiometer has two square vanes (1.0 cm by 1.0 cm), attached to a light horizontal cross arm, and pivoted about a vertical axis through the center, as shown in the figure.
The center of each vane is 6.0 cm from the axis. One vane is silvered and it reflects all radiant energy incident upon it. The other vane is blackened and it absorbs all incident radiant energy. An electromagnetic wave with an intensity of 0.30 kW/m2 is incident normally upon the vanes. What is the torque due to radiation pressure on the vane assembly about the vertical axis?
(c = 3.00 108 m/s, 0 = 4 10-7 T m/A, 0 = 8.85 10-12 C2/N m2)
A) 2.4 10-12 N m
B) 6.0 10-12 N m
C) 1.2 10-11 N m
D) 1.8 10-11 N m
E) 2.4 10-11 N m
Supernova Light Curves
Development of the light microscope
The cross-linking reaction in peptidoglycan synthesis (left) and inhibition of the transpeptidase
A very light ideal spring stretches by when it is used to hang a 135-N object. What is the ...
Artificial cross-fertilization of pea plants
Trihybrid cross to verify independent assortment