# physics

posted by on .

a laser can be used
a. to treat glaucoma
b. to measure distance
d. all of the above

D

in a laser, all of the following forms of energy can be converted into coherent light except
a. chemical energy
b. electrical energy
c. light
d. nuclear energy

D

Which of the following is the process of using a light wave to produce more waves with properties identical to those of the first wave?
a. stimulated emission
b. active medium
c. hologram
d. bandwidth

A

for high resolution in optical instruments, the angle between resolved objects should be
a. as small as possible
b. as large as possible
c. 1.22 degrees
d. 45degrees

i'm not sure but i think B

The angle between the first-order maximum and the central maximum for monochromatic light of 2300 nm is 27degrees. Calculate the number of lines per centimeter on this grating.
a. 1600 lines/cm
b. 2000 lines/cm
c. 2500 lines/cm
d. 4500 lines/cm

B

that would be alll

thanks a lot to anyone who can check all 5 of these :)

• physics - ,

in a laser, all of the following forms of energy can be converted into coherent light except:
Actually, all four energy forms can be converted to coherent light. If your teacher says otherwise, he or she may be unaware of the technology of nuclear lasers. It was an active controversial area of research at one time. Teller sold the Star Wars program to Reagan on that basis.

for high resolution in optical instruments, the angle between resolved objects should be
a. as small as possible

On the last one, the lines per mm is 1973 but has been rounded to 2000, apparently, consistent with the accuracy of the 27 degrees

• physics - ,

in a laser, all of the following forms of energy can be converted into coherent light except:
Actually, all four energy forms can be converted to coherent light. If your teacher says otherwise, he or she may be unaware of the technology of nuclear lasers. It was an active controversial area of research at one time. Teller sold the Star Wars program to Reagan on that basis.

for high resolution in optical instruments, the angle between resolved objects should be
a. as small as possible

• physics - ,