I believe the correct answer is A) 6
Answer: A diode laser which emits at a wavelength of 988 nm is in the infra-red portion of electromagnetic spectrum.
Explanation:
Electromagnetic spectrum shows the wavelength or frequency ranges of different electromagnetic radiations. According to this spectrum, the range for infra-red region is from .
Therefor, a diode laser which emits at a wavelength of 988 nm is in the infra-red portion of electromagnetic spectrum.
The answer is; In the US, hydroelectric power is a more widely used energy source than geothermal energy
Of the total power produced in the US, 7% is contributed by hydroelectric sources while geothermal power contributes only 1% of this total. Hydroelectric contributed about 44% of US renewable energy sources. Both geothermal and hydroelectric plants utilize turbine to harness this energy to electricity.