Question

these graphs show the wavelength and amplitude of light coming from three lasers. could any of these lasers be giving off different types of light?
laser 1:
wavelength = 4 × 10⁻⁷ m
amplitude = medium
laser 2:
wavelength = 4 × 10⁻⁷ m
amplitude = high
laser 3:
wavelength = 8 × 10⁻⁷ m
amplitude = medium
no. all three lasers must be giving off the same type of light because all three are lasers, and the same kind of light source gives off the same type of light.
yes. laser 3 is giving off a different type of light because laser 3 has a different wavelength than lasers 1 and 2.
yes. laser 2 is giving off a different type of light because laser 2 has a different amplitude than lasers 1 and 3.
yes. all three lasers must be giving off different types of light because every light source gives off its own type of light.

Explanation:

To determine if a laser emits a different type of light, we analyze wavelength (determines light type, e.g., color) and amplitude (determines brightness, not type). Laser 1 and 2 have the same wavelength ($4\times10^{-7}\, \text{m}$), so same light type. Laser 3 has a different wavelength ($8\times10^{-7}\, \text{m}$), so it emits a different type. Amplitude (medium/high) affects brightness, not light type, so Laser 2’s amplitude difference doesn’t change its light type. The first option is wrong (same source doesn’t guarantee same light; wavelength differs for Laser 3). The last option is wrong (not all need to differ—Laser 1 and 2 are same). Thus, Laser 3’s different wavelength means it emits a different light type.

Answer:

Yes. Laser 3 is giving off a different type of light because Laser 3 has a different wavelength than Lasers 1 and 2.