Day M

Visible light is one type of radiation, which consists of energy propagated by electric and fields that alternately increase and decrease in intensity as they move through space.

-Electromagnetic-Magnetic

Which of the following statements correctly describe the electromagnetic spectrum? Select all that apply.

-all waves in the spectrum travel at the same speed in a vacuum-the color of visible light is related to its frequency

Which of the following correctly describes the diffraction of light?

Diffraction is the apparent bending of light around the edge of an object in its path.

Visible light and radio waves are both examples of radiation, which has a dual nature, possessing the properties of both and waves.

Electromagnetic, Particles

The _____ of a wave is the number of wave cycles per second. This quantity is given the symbol ν and has units of s-1 or _____.

Frequency and Hz

frequency

Hz ν

Which of the following wave properties are related to the amplitude of an electromagnetic wave? Select all that apply.

Intensity Brightness (for visible light)

Which of the following correctly define, depict the symbol, and provide the units for the speed of electromagnetic radiation (light)? Select all that apply.

Light moves at a constant distance per time. c = 3.00 × 108 m/s c = λ × υ

Which of the following correctly define, depict the symbol, and provide the units for the speed of electromagnetic radiation (light)? Select all that apply.

Light moves at a constant distance per time. c = λ × υ c = 3.00 × 108 m/s

Which of the following statements correctly describes how energy is absorbed by an atom?

The energy of the absorbed radiation must match the difference between the two energy states of the atom.

Which of the following correctly defines the amplitude of a wave?

The height of each crest or depth of each trough

Energy is quantized. What does this mean?

There is a basic unit of energy that cannot be subdivided further.

Atoms, like all other matter, have specific energy levels within them. For an atom to absorb radiation, the energy of the radiation must match the energy between the two energy levels in the atoms.

difference

The apparent bending of a wave around the edge of an object is called _____. If a wave passes through a slit that has a width of the same order of magnitude as its _____, it will bend around both edges of the slit to give a semicircular wave.

diffraction; wavelength

The speed of a wave is determined by multiplying the of the wave by its wavelength. In a vacuum all electromagnetic radiation travels at a constant speed, the speed of , which is equal to 3.00 x 108 m/s. (Include a word in the last fill in the blank space, not a number.)

frequency ; light

Wavelength and frequency are _____ proportional to each other. As wavelength increases, frequency will _____.

inversely; decrease

wavelength

nm λ

Energy is not continuous, but is quantized or divided into "packets," each of which contains a definite amount of energy. An energy packet is called a(n) _____, and the energy of each packet is directly proportional to its _____.

quantum; frequency

All waves in the electromagnetic spectrum travel at the same _____ through a vacuum, but differ in their frequency and wavelength. A wave with a long (large) wavelength will have a _____ frequency.

speed; low

The distance a wave travels during one cycle is called its . This is usually measured as the distance between two or two troughs.

wavelength ; crests