electrical energy, it emits radiation in  a)  the infra-red, visible and ultra-violet regions of the electromagnetic spectrum. b)  the infra- red, visible and x-ray regions of the electromagnetic spectrum. c)  the visible region only

Which of the following is a reasonable wavelength of visible light that could be emitted by a molecule after it absorbs a 500 nm photon? A) 200 nm B) 450 nm C) 700 nm D) 950 nm

2. Calculate the theoretical energy value of each wavelength of light in the helium spectrum to complete the following chart. Table view D List view Helium gas emission spectrum Theoretical energy (J) Wavelength (nm) Color 447 violet 471 blue 501 green 587 yellow 668 red

2. Rank the following regions of the electromagnetic spectrum from highest to lowest wavelength: visible (blue), infared, visible (green), ultraviolet, visible (red), visible (orange)

Explain how the photoelectric effect helps us understand the nature of light

In the photoelectric effect, if the intensity of light shone on a metal increases, what will happen?

Describe the experiment that proves that electromagnetic radiation can behave like a particle.note the key observation in this experiment?(in English - 50 words max).

1. Complete following table for regions of the visible region of the electromagnetic spectrum: Visible Region Wavelength Range (nm) Visible Region Wavelength Range (nm) purple/violet yellow blue orange green red

4. The energy of short-wavelength x-rays is than that of long-wavelength visible light.

Which of the following is true?     A) UV light has higher frequency and longer wavelength than Infrared light.   B) UV light has higher frequency and shorter wavelength than Infrared light.   C) UV light has lower frequency and longer wavelength than Infrared light.   D) UV light has lower frequency and shorter wavelength than Infrared light.