Chapter 2: Light and Telescopes

Question 1 of 19

1

A blackbody emits all its radiation at a single frequency.

Select one of the following:

True
False

Explanation

Question 2 of 19

1

Earth's atmosphere is transparent to all forms of electromagnetic radiation.

Select one of the following:

True
False

Explanation

Question 3 of 19

1

The peak of an object's emitted radiation occurs at a frequency determined by the object's temperature.

Select one of the following:

True
False

Explanation

Question 4 of 19

1

Imagine an emission spectrum produced by a container of hydrogen gas. Changing the amount of hydrogen in the container will change the colors of the lines in the spectrum.

Select one of the following:

True
False

Explanation

Question 5 of 19

1

The wavelengths of the emission lines produced by an element are different from the wavelengths of the absorption lines produced by the same element.

Select one of the following:

True
False

Explanation

Question 6 of 19

1

As a rule, larger telescopes can detect fainter objects.

Select one of the following:

True
False

Explanation

Question 7 of 19

1

An object having a temperature of 300 K would be best observed with an infrared telescope.

Select one of the following:

True
False

Explanation

Question 8 of 19

1

Fill the blank spaces to complete the text.

Visible light is a particular type of radiation and travels through space in the form of a .

Explanation

Question 9 of 19

1

Select from the dropdown lists to complete the text.

A ( wave, period, wavelength, amplitude ) is characterized by its ( wave, period, wavelength, amplitude ), the length of time taken for one complete cycle; its ( wave, period, wavelength, amplitude ), the distance between successive wave crests; and its ( wave, period, wavelength, amplitude ), which measures the size of the disturbance associated with the wave.

Explanation

Question 10 of 19

1

A wave's ❌ counts the number of wave ❌ passing a given point in one second.

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frequency

crests

Explanation

Question 11 of 19

1

Fill the blank space to complete the text.

A beam of white light is bent, or , as it passes through a prism.

Explanation

Question 12 of 19

1

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Different frequencies of light are refracted by different amounts, splitting light into its component colors: the spectrum.

Explanation

Question 13 of 19

1

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The color of visible light indicates its wavelength: red light has a ( longer, shorter ) wavelength than blue light.

Explanation

Question 14 of 19

1

The entire ❌ spectrum consists of (in order of increasing frequency) ❌, ❌, ❌, ❌, ❌, and ❌.

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electromagnetic

radio waves

infrared radiation

visible light

ultraviolet radiation

X-rays

gamma rays

Explanation

Question 15 of 19

1

Fill the blank space to complete the text.

The of an object is a measure of the speed of its component particles.

Explanation

Question 16 of 19

1

Fill the blank spaces to complete the text.

The intensity of radiation of different frequencies emitted by a hot object has a characteristic distribution, called a , that depends only on the object's temperature.

Explanation

Question 17 of 19

1

A ❌ is the characteristic way in which the ❌ of radiation emitted by a hot object depends on ❌. The frequency at which the emitted intensity is highest is an indication of the ❌ of the radiating object. Also referred to as the ❌.

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blackbody curve

intensity

frequency

temperature

Planck curve

Explanation

Question 18 of 19

1

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A ( telescope, spectroscope, interferometer ) is a device for splitting a beam of radiation into its component frequencies and displaying them on a screen or detector for detailed study.

Explanation

Question 19 of 19

1

Many hot objects emit a continuous ❌ of ❌, containing light of all ❌.

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spectrum

radiation

wavelengths

	Created by Rachelle Sappington about 7 years ago

The Universe at a Glance

Chapter 2: Light and Telescopes

Question 1 of 19

A blackbody emits all its radiation at a single frequency.

Select one of the following:

Explanation

Question 2 of 19

Earth's atmosphere is transparent to all forms of electromagnetic radiation.

Select one of the following:

Explanation

Question 3 of 19

The peak of an object's emitted radiation occurs at a frequency determined by the object's temperature.

Select one of the following:

Explanation

Question 4 of 19

Imagine an emission spectrum produced by a container of hydrogen gas. Changing the amount of hydrogen in the container will change the colors of the lines in the spectrum.

Select one of the following:

Explanation

Question 5 of 19

The wavelengths of the emission lines produced by an element are different from the wavelengths of the absorption lines produced by the same element.

Select one of the following:

Explanation

Question 6 of 19

As a rule, larger telescopes can detect fainter objects.

Select one of the following:

Explanation

Question 7 of 19

An object having a temperature of 300 K would be best observed with an infrared telescope.

Select one of the following:

Explanation

Question 8 of 19

Fill the blank spaces to complete the text.

Visible light is a particular type of radiation and travels through space in the form of a .

Explanation

Question 9 of 19

Select from the dropdown lists to complete the text.

Explanation

Question 10 of 19

A wave's ❌ counts the number of wave ❌ passing a given point in one second.

Drag and drop to complete the text.

Explanation

Question 11 of 19

Fill the blank space to complete the text.

A beam of white light is bent, or , as it passes through a prism.

Explanation

Question 12 of 19

Fill the blank space to complete the text.

Different frequencies of light are refracted by different amounts, splitting light into its component colors: the spectrum.

Explanation

Question 13 of 19

Select from the dropdown list to complete the text.

The color of visible light indicates its wavelength: red light has a longer shorter( longer, shorter ) wavelength than blue light.

Explanation

Question 14 of 19

The entire ❌ spectrum consists of (in order of increasing frequency) ❌, ❌, ❌, ❌, ❌, and ❌.

Drag and drop to complete the text.

Explanation

Question 15 of 19

Fill the blank space to complete the text.

The of an object is a measure of the speed of its component particles.

Explanation

Question 16 of 19

Fill the blank spaces to complete the text.

The intensity of radiation of different frequencies emitted by a hot object has a characteristic distribution, called a , that depends only on the object's temperature.

Explanation

Question 17 of 19

A ❌ is the characteristic way in which the ❌ of radiation emitted by a hot object depends on ❌. The frequency at which the emitted intensity is highest is an indication of the ❌ of the radiating object. Also referred to as the ❌.

Drag and drop to complete the text.

Explanation

Question 18 of 19

Select from the dropdown list to complete the text.

A telescope spectroscope interferometer( telescope, spectroscope, interferometer ) is a device for splitting a beam of radiation into its component frequencies and displaying them on a screen or detector for detailed study.

Explanation

Question 19 of 19

Many hot objects emit a continuous ❌ of ❌, containing light of all ❌.

Drag and drop to complete the text.

Explanation

The color of visible light indicates its wavelength: red light has a ( longer, shorter ) wavelength than blue light.

A ( telescope, spectroscope, interferometer ) is a device for splitting a beam of radiation into its component frequencies and displaying them on a screen or detector for detailed study.