Problem 21.
Light of wavelength 650 nm passes through two slits separated by 0.2 mm. The interference pattern is observed on a screen 1.5 m behind the slits. What is the distance between bright fringes of orders 1 and 3.
Solution
Problem 22.
In a doubleslit experiment the wavelength of the light is 600 nm. A very thin piece of glass (index of refraction is 1.4) is placed over one of the slits. Afterward, the central point on the screen is occupied by what had been m=9 bright fringe. What is the thickness of the glass film?
Solution
Problem 23.
In a doubleslit experiment the distance between two nearest bright fringes on a screen, which is 1.2 m behind the slits, is 5 mm. The wavelength of the light is 550 nm. What is the distance between the slits?
Solution
Problem 24.
A double slit illuminated with light of wavelength 650 nm forms a diffraction pattern on a screen 30 cm away. The slit separation is 3000 nm. What is the distance between bright fringes of orders 16 and 15?
Solution
Problem 25.
The bright fringes from a doubleslit are 15 mm apart on a detector that is 1.2 m from the slits. If the slits are illuminated with 650 nm light, how far apart the slits are?
Solution
Problem 26.
How wide is a single slit that gives its second minimum at ?
Solution
Problem 27.
A single slit illuminated with a 550 nm light gives a diffraction pattern on a far screen with its fifth order minimum at from zeroth order. At what angle does the order m=7 occur?
Solution
Problem 28.
What is the angular separation of two spectral lines of wavelengths 550 nm and 600 nm formed in order m=3 with a 529 line/mm grating?
Solution
Problem 29.
A grading with 800 lines/mm is illuminated with light of wavelength 550 nm. What is the angular separation between the two lines formed in order m=2?
Solution
Problem 30.
How long does it take for light to travel a distance of 10 m in vacuum?
Solution
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