Author Question: A coating is being applied to reduce the reflectivity of a pane of glass to light with a wavelength ... (Read 377 times)

fahad · **on:** Jul 29, 2018

A coating is being applied to reduce the reflectivity of a pane of glass to light with a wavelength of 522 nm incident near the normal to the pane. If the material has an index of refraction of 1.375, how thick should the coating be?

A)

60 nm
B)

95 nm
C)

145 nm
D)

65 nm
E)

80 nm

Question 2

A wrench is acting on a nut. The length of the wrench lies directly to the east of the nut. A force 150 N acts on the wrench at a position 15.0 cm from the center of the nut in a direction 30.0 north of east.

What is the torque about the center of the nut? A)

22.5 Nm

B)

11.3 Nm

C)

19.5 Nm

D)

2250 Nm

E)

1949 Nm