User:Manuel Franco Jr./NOtebook/Physics Lab 307/Notes for Balmer Series

Balmer series notes

Day 1

We used neon instead of Hg, b/c we couldn't find Hg. So we used Ne.[1]

Wavelength follows:

Some of the visible lines of neon:

l nm Color

• 540.1 green
• 585.2 yellow
• 588.2 yellow
• 603.0 orange
• 607.4 orange
• 616.4 orange
• 621.7 red-orange
• 626.6 red-orange
• 633.4 red
• 638.3 red
• 640.2 red
• 650.6 red
• 659.9 red
• 692.9 red
• 703.2 red

We are setting the slit at between .5 and 1 mm. We are now trying to figure out the set up works.

Measurments Calibration ( We used neon)

-Accepted Values of Hydrogen Spectra

410.8 Violet1 434.1 Violet2 486.0 Green/Blue 656.0 Red

1st 540.1 nm green.

406.0 Violet1 436.3 Violet2 554.7 Green 670.1 Red

We can see that our results are very bad so we are going to try a new calibration.

We are going to use a helium lamp now let see how that works.

2nd Measurement.

Red (667.8 nm)

So we now now that all our measurements were wrong because we were using the mercury lamp instead of the hydrogen we realized this because of the close yellow lines hydrogen

3nd Measurement.

Red (667.8 nm)

• 411.5 nm violet1
• 436.05 nm violet2
• 499.1 nm green/blue
• 668 nm Red

We found the mercury lamp so we are going to used that one to calibrate now.

Violet at 435.8 nm.

• 410.4 nm pm .1 violet1
• 434.1 nm pm .1 nm violet2
• 486.0 nm pm .05 blue/green
• 660.5 nm

Day 2

For anaylizing information: WIKI[2]

Rydberg Constant[3]