Question

The wavelength of red light is ______ that of a green light.

1) greater than
2) less than
3) same as
4) greater, same or less, depending on the source of light

Answer 1

The wavelength of red light is greater than that of green light, following the properties of the electromagnetic spectrum where longer wavelengths correspond to lower frequencies. so, option 1 is the correct answer.

Step-by-step explanation:

The wavelength of red light is greater than that of green light. According to the electromagnetic spectrum, light wavelengths increase from blue to red, which means blue light has a shorter wavelength than green, and green light has a shorter wavelength than red. This directly correlates with frequency, such that a lower frequency corresponds to a longer wavelength. Red light, having a lower frequency than green light, will have a longer wavelength.

The wavelength of red light is greater than that of green light.

Based on the given information, the frequency and wavelength of different colors of light are inversely related. Blue light has a shorter wavelength and a higher frequency than green light. Therefore, red light, which has a longer wavelength than green light, also has a lower frequency.

For example, red light has a wavelength of approximately 620-750 nm, while green light has a wavelength of approximately 495-570 nm.