Physical science ch 7, 8, and 9

Réussis tes devoirs et examens dès maintenant avec Quizwiz!

Coulomb

unit of electric charge

Electrical forces

Holds atoms and molecules together

ray diagram

How you solve images formed by spherical mirrors graphically

real image

Images that can be formed on a screen

Virtual image

Images that cannot be formed on a screen

Refraction

The bending of a wave accompanied by speed change and a wave length

Diffraction

The bending of a wave around obstacles and openings

Direct Current (DC)

The electron flows in on direction from negative to positive

Photo electric effect

The emission of electrons from a metal when light shines on the metal

Electromagnetism

The interaction between electricity and magnetism

Convex (diverging)

The outside if a spherical section. Thicker at sides

Voltage

The potential difference measured in volts. The amount of work to be done to move a charge from one point to another along an electric circuit.

Polarization

The preferential orientation of the field vectors

Destructive

Wave pulses cancel out each other

Law of Charges

like charges repel, unlike charges attract

Irregular reflection

the bouncing of light in many directions from an uneven surface

Quantum energy

the minimum quantity of energy that can be lost or gained by an atom

near point

the shortest distance at which an object is in sharp focus

Alternation Current (AC)

Constantly changing the voltage from positive to negative and back

closed switch

A complete circuit

Electric charge

A fundamental quantity

Beam

A group of parallel rays

Generator

A machine that converts mechanical energy into electrical energy

magnetic field

A set of imaginary lines that indicates the direction in which a small compass need would point

Ray

A straight line representing the path of light

Spectrometer

An instrument that separates light into a spectrum.

quantum

An oscillating electron can only have specific amounts of energy

classical wave theory

Light is both a wave and a particle

lens

Materials that refract light waves

line-emission spectrum

Narrow beam of the emitted light was shined through a prism, it was separated into four specific colors of the visible spectrum.

Open switch

Not a complete circuit

semiconductor

Not good as a conductor or insulator

Dalton model of the atom

Proposed that an element is composed of tiny, indivisible, indestructible particles.

electric motor

a device that converts electrical energy into mechanical energy

electrical conductor

a material in which charges can move freely

electrical insulator

a material in which charges cannot move freely

concave (converging)

a mirror with a surface that curves inward. Thicker at the center

Line absorption spectrum

dark vertical lines against a continuous range of colours, each line corresponding to a certain wavelength

Ernest Rutherford

discovered the atomic nucleus and proposed a nuclear model of the atom .

Thomas Plum Pudding Model

he thought electrons were randomly distributed within a positively charged cloud

Regular reflection

occurs when parallel rays of light hit a smooth surface


Ensembles d'études connexes

Personality Psychology: Exam 1 Study Set

View Set

Chapter 24. Human Origins and Evolution

View Set

RN Nutrition Online Practice 2023 A

View Set