Photon Energy and Light Intensity

The video tutorial covers the calculation of photon energy using wavelength, the intensity of light at a distance, and the energy difference between photons of different wavelengths. It explains the formulas and calculations involved in determining these values, highlighting common mistakes and providing step-by-step solutions.

What is the wavelength of the red light used in the problem?

• 650 nanometers

• 600 nanometers

• 500 nanometers

• 700 nanometers

How is the energy of a photon calculated using its wavelength?

• E = lambda / (H * C)

• E = H * C / lambda

• E = H * C * lambda

• E = H + C

What is the calculated energy of one photon in joules?

• 3 x 10^-20 joules

• 3 x 10^-17 joules

• 3 x 10^-18 joules

• 3 x 10^-19 joules

How many photons are emitted per minute by the red light?

• 2 x 10^18 photons

• 2 x 10^19 photons

• 2 x 10^20 photons

• 2 x 10^21 photons

What is the formula for calculating light intensity?

• Intensity = Power + Area

• Intensity = Area / Power

• Intensity = Power / Area

• Intensity = Power * Area

What is the intensity of the light one meter away in watts per meter squared?

• 0.08 watts/m^2

• 0.08 watts/cm^2

• 0.8 watts/m^2

• 0.8 watts/cm^2

How is the area of a sphere calculated?

• 4 * PI * R^2

• PI * R^2

• 4 * PI * R

• 2 * PI * R^2

What is the common mistake when calculating energy difference between photons of different wavelengths?

• Using the average of wavelengths

• Using the sum of wavelengths

• Using the product of wavelengths

• Using the simple difference in wavelengths

What is the correct method to find the energy difference between photons of 600 nm and 700 nm?

• Add the energies calculated for each wavelength

• Subtract the energies calculated for each wavelength

• Subtract the wavelengths

• Add the wavelengths

What is the approximate energy difference between photons of 600 nm and 700 nm in electron volts?

• 0.6 eV

• 0.4 eV

• 0.5 eV

• 0.3 eV