Observing emission spectra

☺In CUCL2 every lines from violet-green was visible

☻ In SRCL2 every lines from orange-red was visible

PART 2:

1. I turned on an incandescent lamp and looked at it through a spectroscope. I saw a continuous spectrum.
2. Then I saw the fluorescent lamp through a spectroscope, and I saw all the colours, but they are in the background, except 4 specific colours. Violet, blue, green and red.

3.  With use of mercury discharge tube, I saw some gases through spectroscope. The chart                                                        is listed below.

Questions:

1. Different element have different test colours because, different element has their own unique energy shell.

2. Yes, flame test could be useful in determining identities of metals in a mixture, but the   problem is that some of the metals give the same energy and that could cause problem.  

3. A continuous spectrum contains all the colours visible to our eyes, but the line spectrum contains only one or more specific colour.

4. Every element gives their specific line. Hydrogen gives a green and at red line in the spectroscope. Whenever we see only a green and a red line with the same wave length, we know that it is Hydrogen.