Question

A diffraction pattern is obtained by making blue light incident on a narrow slit. If blue light is replaced by the red light. Then the diffraction bands?

Answer 1

Answer: B

Explanation:Because the red light is more travel than blue light

Answer 2

The diffraction pattern depends upon the two factors that are given below:

• The first one is wavelength.
• The second one is width.
• When we take the blue light, its wavelength is between 490-495nm. But the wavelength of red light is near to 700nm.
• As the wavelength of red light is greater than blue light which means, red light is much more wider than blue light.
• As which has greater wavelength and greater width, has broader area bands.
• Therefore the diffraction bands becomes broader