Emission and Absorption Spectra

Front

What is an Emission Spectrum?

Back

An Emission Spectrum is a spectrum of the electromagnetic radiation emitted by a source, showing bright lines at specific wavelengths corresponding to the energy levels of electrons in atoms.

Front

What is an Absorption Spectrum?

Back

An Absorption Spectrum is a spectrum that shows dark lines or bands at specific wavelengths where light has been absorbed by atoms or molecules, indicating the energy levels of electrons.

Front

What must an electron do to move from the ground state to an excited state?

Back

An electron must absorb energy to move from the ground state to an excited state.

Front

What is the relationship between wavelength, frequency, and energy?

Back

A wave with a large wavelength has a low frequency and low energy.

Front

What is the order of electromagnetic waves from longest to shortest wavelength?

Back

Radio, Micro, Infrared, Visible, Ultraviolet, X-ray, Gamma.

Front

What is a Continuous Spectrum?

Back

A Continuous Spectrum is a spectrum that shows a complete range of wavelengths without any gaps, typically produced by a solid, liquid, or densely packed gas.

Front

What is a Line Spectrum?

Back

A Line Spectrum is a spectrum that consists of discrete lines, each corresponding to a specific wavelength emitted or absorbed by an atom.

Front

How does temperature affect the emission spectrum of an object?

Back

As the temperature of an object increases, it emits more radiation at shorter wavelengths, shifting its emission spectrum towards the blue end.

Front

What is the significance of the Balmer series?

Back

The Balmer series is a set of spectral lines corresponding to transitions of electrons in hydrogen atoms from higher energy levels to the second energy level.

Front

What is the photoelectric effect?

Back

The photoelectric effect is the phenomenon where electrons are emitted from a material when it absorbs light of sufficient energy.