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AQA A level physics paper 1-Questions & Answers 100% Solved
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AQA A level physics paper 1-Questions & Answers 100% Solved
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AQA A level physics paper 1-Questions & Answers 100%Solved
What is the purpose of coating in a fluorescent tube? Correct Ans-UV/ High energy
photons emitted from mercury atoms when the electrons in the atom de-excite (1)
High energy photons absorbed by the coating (1)
Coating emits photons in the visible spectrum (1)
What happens when annihilation occurs? (2) Correct Ans-particle and an anti-particle
collide and cease to exist (1)
Their mass is released as energy in the form of a pair of gamma photons (1)
How does the strong nuclear force between two nucleons vary with the separation of the
nucleons? (3) Correct Ans-repulsive at < 0.5 fm (1)
attractive from 0.5 to 3 fm (1)
above 3 fm, force 0 (1)
, AQA A level physics paper 1-Questions & Answers 100%
Solved
What is meant by monochromatic light Correct Ans-light of a single frequency
What is meant by coherent Correct Ans-constant phase difference
Effect on diffraction pattern when wavelength decreases (3) Correct Ans-Maxima closer
together (1) angle decreases (1) smaller path difference (1)
What happens when white light is used in slits instead of monochromatic light? (4) Correct
Ans-Central bright fringe (maximum) is white (1)
Fringes on either side are continuous spectra (1)
Dark fringes would be closer together due to λred being larger than the average λwhite (1)
Bright fringes (maxima) are wider
How do diffraction patterns (fringes on the screen) form? Correct Ans-Interference (1)
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