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SNC201 > Optics Quiz #1 > Flashcards

Optics Quiz #1 Flashcards

1
Q

What is light?

A

A form of energy that travels in waves through empty space and materials.

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2
Q

What is energy?

A

A measure of the ability to do work.

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3
Q

What are examples of stored or potential energy?

A
  • Batteries
  • Water behind a dam
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4
Q

What are examples of kinetic energy?

A

Objects in motion.

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5
Q

What creates electromagnetic fields?

A

Charged particles such as electrons and protons.

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6
Q

What type of energy do moving charged particles transport?

A

Electromagnetic radiation.

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7
Q

What is the wavelength?

A

The distance from one crest (or trough) to the next crest (or trough).

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8
Q

What is the symbol for wavelength?

A

λ (lambda)

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9
Q

What are the components of electromagnetic waves?

A
  • Electrical energy
  • Magnetic energy
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10
Q

How do the electrical and magnetic fields in electromagnetic waves relate to each other?

A

They are perpendicular to one another in the direction the wave is traveling.

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11
Q

What happens to energy once it is formed in an electromagnetic wave?

A

It travels at the speed of light until further interaction with matter.

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12
Q

Fill in the blank: Light behaves like an _______ wave.

A

electromagnetic

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13
Q

What is the movement of energy from one point to another referred to as?

A

Waves.

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14
Q

How can electromagnetic radiation be described?

A

Frequency, wavelength, or energy

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15
Q

What’s frequency?

A

The number of crests that pass a given point within a second

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16
Q

The distance between crest is called what

A

Wavelength

17
Q

What is energy?

A

An electromagnetic wave that can also be described in terms of its energy.
Ex. Electron volts (eV)

18
Q

What’s an Electron Volt?

A

The amount of kinetic energy needed to move an electron through one volt potential

19
Q

Fill in the blank: when the frequency is higher, the waves in a wavelength _____

A

Increase

20
Q

What is electromagnetic spectrum?

A

A representation of the types of electromagnetic waves arranged according to wavelength

21
Q

What are some examples of electromagnetic waves?

A

Radio, waves, microwaves, visible light, UV radiation, x-rays.

22
Q

What’s electromagnetic radiation?

A

A stream of massless particles, called photons, each travelling in a wave like pattern at the speed of light

23
Q

What’s invisible light?

A

It’s types of radiation that are in the form of light, but we don’t have the ability to see

24
Q

What’s visible light?

A

The small portion of electromagnetic radiation that we can see

25
Q

What is an example of visible light?

A

Colours

26
Q

How are we able to see visible light?

A

Through cone shaped cells in our eyes that act as receivers tune to the wavelength in the narrow band of the spectrum

27
Q

What is the shortest and longest visible wavelengths?

A

Violet- 4.0 x 10-7m
Red- 7.0 x 10-7m

28
Q

What are sources of light?

A

Light from the sun, light from incandescence, light from luminescence

29
Q

Define incandescence

A

Light given off by an object because it is very hot. EX – incandescent lightbulb.

30
Q

Define Luminescence

A

Light given off by an object that has not been heated. EX- fluorescence, phosphorescence, chemiluminescence, bioluminescence

31
Q

Define fluorescence

A

Light omitted during exposure of the source ultraviolet (UV) light. EX-Fluorescent lightbulb.

32
Q

Define phosphorescence

A

Light omitted during exposure of the source to ultra violet(UV) light in continues to be admitted for several minutes or even a few hours after the UV light has been removed. EX – glow-in-the-dark toys

33
Q

Define chemiluminescence

A

Light produced by a chemical reaction without producing heat. EX – glow stick.

34
Q

Define bioluminescence

A

Light produced by a biochemical reaction in a living organism. EX – jellyfish

SNC201 (2 decks)

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