LIGHT HOTS Flashcards
refractive indeces of alchol, water and ice are given as 1.36, 1.33 and 1.31. identify the set of media when light falling obliquely will travel faster
it will travel faster when it moves from a denser to ararer medium. so there are three sets of such media
i) alcohol->water
ii)alcohol->ice
iii)water->ice
during refraction of light in a glass slab, what happens when angle of incidence is increased?
when angle of incidence is increaed angle of refraction will also incrase because sin i/ sin r is a constant. This does not aply when it falls normally.
Show diagrammatically, how should two converging lenses be arranged so that a parallel beam becomes parallel after passing through two lenses.
If the distance between two lenses becomes equal to sum of their focal lengths, then the parallel beam of light will emerge parallel after passing through the second lens.
certain conversions
1 angstrom= 10⁻¹⁰ x m
1 nm= 10⁻⁹ x m
1 picometer (pm)= 10⁻¹² x m
1 femtometer(fm)= 10⁻¹⁵ x m
1 μmeter= 10⁻⁶ xm
Why do we use blue colour solution after washing the clothes?
After washing clothes we use blue color for brightening the clothes As the white clothes are deficient in ultra-violet wavelengths, this can be rectified by using violet or blue colors solutions.
