Physics Quiz on Diffraction and Interference

What is the main focus of the lesson in the General Physics playlist?

• Thermodynamics

• Quantum mechanics

• Single slit diffraction and diffraction gratings

• Newton's laws of motion

In single slit diffraction, what happens to light as it passes through the slit?

• It remains unchanged

• It reflects back

• It spreads out in all directions

• It gets absorbed

What is the condition for destructive interference in single slit diffraction?

• a sin Theta = m Lambda

• a sin Theta = (m + 0.5) Lambda

• a sin Theta = (m + 1) Lambda

• a sin Theta = (m/2) Lambda

How is the path difference calculated in single slit diffraction?

• a sin Theta

• a/4 sin Theta

• a/2 sin Theta

• D sin Theta

In the example problem, what is the wavelength of light calculated for the first order dark fringe?

• 500 nm

• 420 nm

• 700 nm

• 600 nm

What is a key characteristic of diffraction gratings compared to single slit diffraction?

• They have many slits

• They have only one slit

• They absorb light

• They do not cause interference

How are the lines from a diffraction grating described?

• Equally spaced and of equal intensity

• Unequally spaced and of varying intensity

• Randomly spaced and of random intensity

• Equally spaced and of varying intensity

What is the formula used to calculate the wavelength of light in a diffraction grating?

• a cos Theta = m Lambda

• D cos Theta = m Lambda

• a sin Theta = m Lambda

• D sin Theta = m Lambda

In the diffraction grating example, what is the distance between adjacent slits if there are 1,000 slits per centimeter?

• 1 * 10^-5 m

• 1 * 10^-3 m

• 1 * 10^-4 m

• 1 * 10^-6 m

What is the wavelength of light calculated in the diffraction grating example for the first order bright fringe?

• 660 nm

• 550 nm

• 770 nm

• 440 nm