Question

a grating has 6000 lines per cm . how many order of light of wavelength 4500 A can be seen

Answer 1

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Answer 2

Answer:

When a grating contains 6000 lines per centimeter, we need to determine how many orders of light at a wavelength of 4500 A° there are.

Solution:

The number of orders of light at a wavelength is given by the formula

                   n = 1/N,

where N is equal to 6000 lines per cm and is equal to 4500 A°, or 4500 10-8 cm.

Therefore, n = 1/(6000 4500 10-8)

                     = 1/(2.7 10 1)

                     = 10/2.7

                     = 3.7 4, meaning there are 3 orders of light.

• Determine the most orders that will be visible when employing light with a 600 nm wavelength and a diffraction grating of 500 lines per millimeter.
• As a result, there can be a maximum of three orders, and a total of seven photos of the source are displayed (three on each side of a central image)

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