Diffraction and Wavelength Measurement

The video tutorial explains a diffraction experiment using lasers and gratings. It covers the setup, measurement of diffraction patterns, and calculation of the wavelength of laser light. The tutorial also discusses the importance of understanding diffraction angles and provides final calculations and results. Precautions for conducting the experiment are highlighted to ensure accuracy and consistency in results.

What is the purpose of arranging the operators in a straight line in the experiment setup?

• To reduce the diffraction of the laser light

• To change the color of the laser light

• To ensure the laser light passes through the grating correctly

• To increase the intensity of the laser light

How is the central diffraction spot marked on the screen?

• With a blue marker

• As 'A' with a value of one

• As 'C' with a value of zero

• With a red marker

What is the significance of measuring the distance between consecutive diffraction spots?

• To determine the color of the laser light

• To calculate the intensity of the laser light

• To calculate the diffraction angles

• To adjust the grating position

Which formula is used to calculate the angle of diffraction?

• tan(theta) = opposite/adjacent

• cos(theta) = adjacent/hypotenuse

• sin(theta) = opposite/hypotenuse

• theta = adjacent/opposite

What is the grating constant 'D' used for in the wavelength calculation?

• To measure the intensity of light

• To adjust the laser power

• To calculate the wavelength of light

• To determine the color of light

What is the average wavelength of the laser light calculated in the experiment?

• 681.8 nanometers

• 600.0 nanometers

• 700.0 nanometers

• 650.0 nanometers

Why is it important to ensure the grating is fixed properly during the experiment?

• To prevent the laser from changing color

• To ensure accurate diffraction patterns

• To increase the speed of the experiment

• To reduce the number of diffraction spots

What should be done to ensure the accuracy of the distance measurements?

• Measure only the central spot

• Use a ruler with a red marker

• Use a digital scale

• Ensure the setup is not disturbed

What does a consistent wavelength measurement across different trials indicate?

• The laser light is blue

• The setup and measurements are accurate

• The grating is not aligned

• The laser intensity is too high

What is the wavelength range for red-colored light?

• 800 to 900 nanometers

• 500 to 600 nanometers

• 600 to 700 nanometers

• 700 to 800 nanometers