Colours reflected from an oil film on water depend on all of the following factors EXCEPT
Correct answer: D. Thickness of the film.
- A. Density of oil.
- B. Angle of view.
- C. Index of refraction.
- D. Thickness of the film.
Explanation
The thickness of the film is a critical factor in thin-film interference, which governs the colors reflected from an oil film on water. The interference pattern depends on the path difference between light waves reflected from the top and bottom surfaces of the film. The density of the oil does not directly affect the color reflection, as it is more relevant to the physical properties rather than optical properties. The angle of view affects the path difference and thus the interference pattern, making it influential in the observed colors. The index of refraction influences how light waves bend and interfere within the film, affecting the reflected colors. Therefore, the correct answer is the thickness of the film, as it is least related to the direct observation of colors from the film.
Last updated
About Superposition and Interference
Superposition states that overlapping waves produce a resultant displacement equal to the algebraic sum of their individual displacements. Interference covers constructive and destructive interference, phase difference, path difference, coherent sources, and conditions for maxima and minima. It differs from diffraction, which involves spreading around openings or obstacles.
Practise Waves
1,281 free Waves MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A monochromatic light is incident on two slits and an interference pattern is produced on a screen at distance L. Now one slit is covered, and no light comes from it. What is the change in pattern on the screen?
A source 'Y' of unknown frequency produces 4 beats with a source of 240 Hz and 8 beats with a sound of 252 Hz. Frequency of the source 'Y' is:
A tuning fork A produces four beats with another tuning fork B. If the frequency of tuning fork B is 320 Hz, then the frequency of tuning fork A is:
A yellow light of wavelength 500 nm emitted by a single source passes through two narrow slits 1 mm apart. How far apart are two adjacent bright fringes when interference is observed on a screen 10 m away?
All of the following are considered as everyday examples of resonance EXCEPT