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Questions and Answers
Which theory provides the broadest definition of what an acid and base are?
Which theory provides the broadest definition of what an acid and base are?
- Antoine Lavoisier's theory
- Brønsted–Lowry theory
- Lewis model (correct)
- Arrhenius theory
Who provided the first concept related to acid–base reactions around 1776?
Who provided the first concept related to acid–base reactions around 1776?
- Lewis
- Brønsted
- Antoine Lavoisier (correct)
- Arrhenius
Which acid–base theory is the most restrictive?
Which acid–base theory is the most restrictive?
- Brønsted–Lowry theory
- Antoine Lavoisier's theory
- Arrhenius theory (correct)
- Lewis model
In what way can acid–base reactions be used to determine pH?
In what way can acid–base reactions be used to determine pH?
What is the importance of acid–base theories in analyzing gaseous or liquid species?
What is the importance of acid–base theories in analyzing gaseous or liquid species?
Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm)
Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm)
Gamma rays, X-rays, microwaves and radio waves are also considered as types of light in physics
Gamma rays, X-rays, microwaves and radio waves are also considered as types of light in physics
The speed of light in vacuum is 299,792,458 m/s
The speed of light in vacuum is 299,792,458 m/s
Light can be analyzed as both waves and particles
Light can be analyzed as both waves and particles
The study of light is known as optometry
The study of light is known as optometry
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Study Notes
Light and Electromagnetic Radiation
- Visible light is electromagnetic radiation that can be perceived by the human eye, with wavelengths between 400-700 nanometers (nm) and frequencies of 750-420 terahertz.
- Visible light falls between infrared (with longer wavelengths) and ultraviolet (with shorter wavelengths) on the electromagnetic spectrum.
- The term "light" can refer to electromagnetic radiation of any wavelength, including gamma rays, X-rays, microwaves, and radio waves.
- Primary properties of light include intensity, propagation direction, frequency or wavelength spectrum, and polarization.
Characteristics of Light
- Light in vacuum travels at a speed of 299792458 m/s, a fundamental constant of nature.
- Light consists of massless elementary particles called photons, which represent the quanta of the electromagnetic field.
- Light can be analyzed as both waves and particles.
Study of Light
- The study of light is known as optics.
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