Infrared, visible and ultraviolet radiations/ light have different properties. Which one of the following statements related to these radiations/light is not correct?

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Q: 14 (CDS-II/2017)
Infrared, visible and ultraviolet radiations/ light have different properties.
Which one of the following statements related to these radiations/light is not correct?

question_subject: 

Science

question_exam: 

CDS-II

stats: 

0,31,60,21,15,24,31

keywords: 

{'infrared light': [0, 0, 0, 1], 'ultraviolet radiation': [1, 0, 1, 0], 'infrared': [0, 0, 3, 4], 'ultraviolet': [0, 0, 0, 1], 'wavelength': [0, 0, 3, 3], 'different properties': [0, 0, 0, 2], 'visible light': [0, 0, 6, 6], 'photon energy': [0, 0, 0, 1], 'radiations': [0, 0, 1, 1], 'light': [16, 4, 34, 62]}

Option 1 states that the wavelength of infrared is more than that of ultraviolet radiation. This is true because infrared radiation has longer wavelengths than ultraviolet radiation.

Option 2 states that the wavelength of ultraviolet is smaller than that of visible light. This is also true because ultraviolet radiation has shorter wavelengths than visible light.

Option 3 states that the photon energy of visible light is more than that of infrared light. This is true because photon energy is directly proportional to the frequency of the radiation, and visible light has a higher frequency (and thus more energy) than infrared light.

Option 4 states that the photon energy of ultraviolet is lesser than that of visible light. This statement is incorrect. Ultraviolet radiation actually has a higher photon energy than visible light. The energy of a photon is directly proportional to its frequency, and since ultraviolet radiation has a higher frequency than visible light, it also has a higher photon energy.

Therefore, the correct answer is that option 4 is not correct.

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