The Photoelectric Effect Alternate E-day Project

Posljednje ažuriranje over 1 year ago

Napomena autora:

You have one E-day session to complete this project.

Instrukcije

You have one E-day session to complete this project.

Work your way through this project, reading the slides and answering the questions.

REVISION OF EM WAVES

Watch the embedded video below. If you have issues playing it within Formative, you can watch it on You Tube using this link

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Obavezno

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Copy this worked example into your workbook

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THE PHOTOELECTRIC EFFECT

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Watch this short video on the photoelectric effect.

You can also watch it on You Tube by clicking this link (first 2:43 min)

Obavezno

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Obavezno

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The Photoelectric Effect Alternate E-day Project

Posljednje ažuriranje over 1 year ago

Napomena autora:

You have one E-day session to complete this project.

Instrukcije

You have one E-day session to complete this project.

Work your way through this project, reading the slides and answering the questions.

REVISION OF EM WAVES

Watch the embedded video below. If you have issues playing it within Formative, you can watch it on You Tube using this link

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Obavezno

The electric and magnetic fields in electromagnetic waves are oriented

parallel to the wave's direction of travel, as well as to each other.

parallel to the waves direction of travel, and perpendicular to each other.

perpendicular to the wave's direction of travel, and parallel to each other.

perpendicular to the wave's direction of travel, and also to each other.

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Obavezno

Which measures the number of waves that pass a certain point per second?

Wavelength

Frequency

Speed of light

Amplitude

Obavezno

What happens to wavelength if the frequency of a wave doubles?

halves

doubles

quadruples

Wavelength is unrelated to frequency

Obavezno

Which type of wave has the longest wavelength?

Radio waves

Visible light

X-rays

Gamma rays

Obavezno

What is the relationship between the frequency and energy of a wave?

Inversely proportional

No relationship

Directly proportional

The square of the frequency equals the energy

Obavezno

What defines the colour of light within the visible spectrum?

Amplitude

Polarization

Frequency

Speed

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Copy this worked example into your workbook

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Please upload a scanned copy of the Worked example table in your workbook, proving you have copied it into your book.

THE PHOTOELECTRIC EFFECT

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Obavezno

What is the photoelectric effect?

Absorption of electrons when light hits a metal

Reflection of electrons when light shines on a metal

Emission of electrons when light shines on a metal

Emission of protons when light shines on a metal

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Obavezno

In the photoelectric effect ....

The energies of electrons liberated by light depend on the frequency of the light

The energies of electrons liberated by light depend on the source of the light

The energies of electrons liberated by light depend on the intensity of the light.

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Obavezno

Who proposed the concept of 'quantum' in physics?

Albert Einstein

Isaac Newton

Max Planck

Niels Bohr

Obavezno

What is the term for the smallest discrete amount of any physical quantity?

Quanta

Photon

Quantum

Atom

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Obavezno

What is the wavelength and frequency of UV light with energy of 3,74 x 10⁻¹⁸ J?

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Obavezno

The photoelectric effect supports the particle theory of light because:

light photons are always reflected

light's wavelength is always the same

light behaves like a constant wave

light photons are absorbed resulting in electron emission

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Obavezno

Which scientist initially explained the photoelectric effect?

Albert Einstein

Niels Bohr

James Clerk Maxwell

Maxwell plank

Obavezno

Which photon is more energetic: A red one or a violet one?

they have the same energy

the red one

the violet one

can't say

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Obavezno

What does 'threshold frequency' signify in the context of the photoelectric effect?

Average frequency of light required to eject electrons

Maximum frequency of light to produce photoelectric effect

Lowest frequency of light needed to eject electrons

Constant frequency in photoelectric effect

Obavezno

What does the 'work function' represent in the context of the photoelectric effect?

The constant energy in effect

The minimum energy needed to remove an electron from a particular metal

The maximum energy needed to remove an electron from a particular metal

The average energy needed to add an electron to a particular metal

Watch this short video on the photoelectric effect.

You can also watch it on You Tube by clicking this link (first 2:43 min)

Look at what happens when light of various frequencies is shone onto a metal.

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Obavezno

What happens if the frequency of light is below the threshold frequency?

No electrons are emitted

Electrons are emitted at a slower pace

All electrons are emitted

Only half of the electrons are emitted

Obavezno

According to the photoelectric effect, what determines the kinetic energy of the ejected electrons?

Size of the metal surface

Intensity of the incident light

Color of the incident light

Frequency of the incident light

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Obavezno

Which factor does NOT affect the number of electrons emitted in the photoelectric effect?

Metal surface's cleanliness

Frequency of light

Intensity of light

Type of metal used

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Obavezno

Drugi mogući odgovor:

threshold frequency

intensity

equal to

energy

less than

frequency

work function

greater than

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Consider the following photoelectric effect graph obtained for two metals P and Q.

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ANSWERS MUST BE TYPED IN SCIENTIFIC NOTATION WHERE APPLICABLE.

Type the answers for each of these using this as an example: 9,22 x 10^-12 should be typed as 9,22 x 10^-12

Obavezno

Which metal has the highest threshold frequency?

They have the same

Can't say

Obavezno

	wavelength (m)	frequency (Hz)
3,62 × 10¹⁴
5,67 × 10¹⁵
5,29 × 10⁻⁸
1,10 × 10⁻²⁰

	wavelength (m)	frequency (Hz)
3,62 × 10¹⁴
5,67 × 10¹⁵
5,29 × 10⁻⁸
1,10 × 10⁻²⁰

The Photoelectric Effect Alternate E-day Project

REVISION OF EM WAVES

THE PHOTOELECTRIC EFFECT

The Photoelectric Effect Alternate E-day Project

REVISION OF EM WAVES

The electric and magnetic fields in electromagnetic waves are oriented

Which measures the number of waves that pass a certain point per second?

What happens to wavelength if the frequency of a wave doubles?

Which type of wave has the longest wavelength?

What is the relationship between the frequency and energy of a wave?

What defines the colour of light within the visible spectrum?

Please upload a scanned copy of the Worked example table in your workbook, proving you have copied it into your book.

THE PHOTOELECTRIC EFFECT

What is the photoelectric effect?

In the photoelectric effect ....

Who proposed the concept of 'quantum' in physics?

What is the term for the smallest discrete amount of any physical quantity?

What is the wavelength and frequency of UV light with energy of 3,74 x 10−18 J?

The photoelectric effect supports the particle theory of light because:

Which scientist initially explained the photoelectric effect?

Which photon is more energetic: A red one or a violet one?

What does 'threshold frequency' signify in the context of the photoelectric effect?

What does the 'work function' represent in the context of the photoelectric effect?

What happens if the frequency of light is below the threshold frequency?

According to the photoelectric effect, what determines the kinetic energy of the ejected electrons?

Which factor does NOT affect the number of electrons emitted in the photoelectric effect?

Which metal has the highest threshold frequency?

The electric and magnetic fields in electromagnetic waves are oriented

Which measures the number of waves that pass a certain point per second?

What happens to wavelength if the frequency of a wave doubles?

Which type of wave has the longest wavelength?

What is the relationship between the frequency and energy of a wave?

What defines the colour of light within the visible spectrum?

Please upload a scanned copy of the Worked example table in your workbook, proving you have copied it into your book.

What is the photoelectric effect?

In the photoelectric effect ....

Who proposed the concept of 'quantum' in physics?

What is the term for the smallest discrete amount of any physical quantity?

What is the wavelength and frequency of UV light with energy of 3,74 x 10−18 J?

The photoelectric effect supports the particle theory of light because:

Which scientist initially explained the photoelectric effect?

Which photon is more energetic: A red one or a violet one?

What does 'threshold frequency' signify in the context of the photoelectric effect?

What does the 'work function' represent in the context of the photoelectric effect?

What happens if the frequency of light is below the threshold frequency?

According to the photoelectric effect, what determines the kinetic energy of the ejected electrons?

Which factor does NOT affect the number of electrons emitted in the photoelectric effect?

Which metal has the highest threshold frequency?

Which metal has the greatest work function?

Calculate the work function of Q.

Which metal has the greatest work function?

Calculate the work function of Q.

What is the wavelength and frequency of UV light with energy of 3,74 x 10⁻¹⁸ J?

What is the wavelength and frequency of UV light with energy of 3,74 x 10⁻¹⁸ J?