The spectrum from a hydrogen vapour lamp is measured and four lines in the visible light range are observed. these lines are the so-called balmer series, where an electron makes a transition from a higher level to the second energy level (n2). in this series, the transition from n, 3 to ne 2 produces the photon with the lowest energy, this corresponds to the line with the longest wavelength. this is measured to be a 658.9 nm what value of the rydberg constant r is obtained using these measurements? express you answer in um to two decimal places. it is not necessary to specify the units.

Explanation:

Rydberg's formula is used to describe the wavelengths of the spectral lines of chemical elements similar to hydrogen, that is, with only one electron being affected by the effective nuclear charge. In this formula we can find the rydberg constant, knowing the wavelength emitted in the transcision between two energy states, we can have a value of the constant.

Where it is the wavelength of the light emitted, R is the Rydberg constant, Z is the atomic number  of the element and are the states where .

In this case we have Z=1 for hydrogen, solving for R:

This value is quite close to the theoretical value of the constant

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.