Author Question: A lens is made with focal length -40 cm using a material with index of refraction 1.50. A second ... (Read 192 times)

jparksx · **on:** Jul 29, 2018

A lens is made with focal length -40 cm using a material with index of refraction 1.50. A second lens is made with the same geometry as the first but using a higher index material, the index being 2.00.

What is the focal length of the second lens? A)

-40 cm
B)

-80 cm
C)

-53 cm
D)

-20 cm
E)

-30 cm

Question 2

A photon has an energy of 6.60 eV. To what wavelength does this energy correspond?

A)

100 nm
B)

118 nm
C)

151 nm
D)

173 nm
E)

189 nm