Which one of the following statements is not correct ?
[amp_mcq option1=”The longest wavelength of light visible to human eye is about 700 nm” option2=”The shortest wavelength of light visible to human eye is about 400 nm” option3=”The wavelength of gamma rays is longer than that of X-rays” option4=”The ability of a telescope to form separable images of close objects is called its resolving power” correct=”option3″]
This question was previously asked in
UPSC NDA-2 – 2016
The electromagnetic spectrum is ordered by wavelength (or frequency/energy). Moving from shorter wavelengths to longer wavelengths, the order is typically Gamma rays, X-rays, Ultraviolet, Visible light, Infrared, Microwaves, Radio waves. Therefore, gamma rays have shorter wavelengths than X-rays. The statement that the wavelength of gamma rays is longer than that of X-rays is incorrect.
Order of electromagnetic spectrum components by increasing wavelength: Gamma < X-ray < UV < Visible < IR < Microwave < Radio.