please check these:

a laser can be used
a. to treat glaucoma
b. to measure distance
c. to read bar codes
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 :)

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

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

Your other answers are fine

i was researching other teachers' answers and they had this

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

Great! Let's check your answers:

1. a laser can be used to treat glaucoma, measure distance, and read barcodes. Therefore, the correct answer is (d) all of the above. You answered correctly.

2. In a laser, all forms of energy except nuclear energy can be converted into coherent light. Therefore, the correct answer is (d) nuclear energy. You answered correctly.

3. The process of using a light wave to produce more waves with properties identical to those of the first wave is called stimulated emission. Therefore, the correct answer is (a) stimulated emission. You answered correctly.

4. For high resolution in optical instruments, the angle between resolved objects should be as small as possible. Therefore, the correct answer is (a) as small as possible. You answered correctly.

5. To calculate the number of lines per centimeter on a grating, we can use the formula: Number of lines per centimeter = (1/d), where d is the spacing between the lines on the grating. Given that the angle between the first-order maximum and the central maximum is 27 degrees and the wavelength is 2300 nm (or 0.023 cm), we can use the formula d = λ / sin(θ). Plugging in the values, we get d = 0.023 cm / sin(27 degrees), which is approximately 0.055 cm. Taking the reciprocal, the number of lines per centimeter is approximately 18.2 lines/cm. None of the provided answer choices matches this result, so none of the options are correct.

Therefore, you got 4 out of 5 questions correct. Well done!