Which of the following is least reasonable regarding light waves?    a) Ultraviolet light has a shorter wavelength and lower frequency than visible light.   b) Frequency is equal to the speed of the wave divided by the wavelength of the wave.    c) An apple which appears red in white light would appear black when illuminated by blue light.   d) Light visible to the human eye is the part of the electromagnetic spectrum with wavelengths roughly in the range of 400-700 nanometers.   e) A banana appears yellow because it reflects red and green colors while absorbing blue.

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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.