Im really lost on this can u pls help 1. Propose a hydrogen electron transition that involves light with a wavelength in the ultraviolet (UV) range (10-400nm)
2. Propose a hydrogen electron transition that involves light with a wavelength in the infared (IR) range (1000-106 nm)

Describe in detail the melting point behavior of the 80: 20 benzoic acid-mandelic acid mixture

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.