You reproduce Young's experience using a helium-neon laser. A) Describe the editing of this experiment B) Describe the possible interference boss you see on your screen C) Suppose the distance between five black fringes is 2.1 cm, the distance from the screen is 2.5 m and the distance between the two slots is 0.30 mm, determines the wavelength and the Laser colour. Please help me with this.

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Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.