Which one of the following statements is not correct ?

The electromagnetic spectrum is organized by wavelength and frequency. Visible light ranges from approximately 400 nm (violet) to 700 nm (red) [1]. Statement 1 and 2 are correct as they describe these boundaries of human vision [1]. Statement 4 is also correct; resolving power is the ability of an optical instrument, like a telescope, to distinguish between two closely spaced objects as separate entities. However, statement 3 is incorrect. In the electromagnetic spectrum, gamma rays have the shortest wavelengths and highest frequencies, while X-rays have slightly longer wavelengths than gamma rays. Specifically, X-rays range from about 0.01 to 10 nm, whereas gamma rays typically have wavelengths shorter than 0.01 nm. Therefore, the claim that gamma ray wavelengths are longer than X-ray wavelengths is scientifically false.

Sources

1. [1] https://satheeneet.iitk.ac.in/article/physics/physics-visible-light/