Question

how are reflecting telescopes similar to devices that produce laser light?
o both use crystals to produce a beam of light.
o both have convex lenses that magnify objects.
o both have concave lenses that magnify objects.
o both use mirrors to reflect a beam of light.

Explanation:

• Reflecting telescopes use mirrors (such as a concave primary mirror and a flat secondary mirror) to reflect light and form an image.
• Laser - producing devices (like a laser cavity) often use mirrors (a highly reflective mirror and a partially reflective mirror) to reflect the light within the cavity, which is essential for the amplification and coherent emission of laser light.
• Crystals are not a common element in the basic operation of reflecting telescopes. Convex and concave lenses are not relevant to the key similarity here as the question is about reflection.

Answer:

Both use mirrors to reflect a beam of light.