A parallel beam of light containing red (660 nm) and blue (470
nm) wavelengths goes from...
A parallel beam of light containing red (660 nm) and blue (470
nm) wavelengths goes from diamond to water, striking the surface
between them at a 19° incident angle. What is the angle between the
two colors in water?
A narrow beam of light containing red (660 nm) and yellow (580
nm) wavelengths goes from polystyrene to air, striking the surface
at a 34.5° incident angle. What is the angle (in degrees) between
the colors when they emerge? ° (b) How far would they have to
travel (in m) to be separated by 1.00 mm? m
A beam of light containing red (660 nm) and violet (410 nm)
wavelengths travels from air, through a flat piece of crown glass
1.92 cm thick, and then back to air. (a) If the beam has an angle
of incidence of 36.0° in air, determine the angle at which the two
colors of light emerge from the crown glass. The index of
refraction respectively for red and violet light in crown glass is
1.512 and 1.530. (Enter a number to...
Horizontal rays of red light (λ = 660 nm, in vacuum)
and violet light (λ = 410 nm, in vacuum) are incident on
the flint-glass prism shown in the drawing. The indices of
refraction for the red and violet light are
nred = 1.662 and nviolet =
1.698. The prism is surrounded by air. What is the angle of
refraction for (a) red ray, (b)
violet ray as it emerges from the prism?
Blue light of wavelength 470 nm is used to illuminate a pair of
narrow slits that are 0.020 mm apart and 1.60 m from a screen.
(a) What is the angular position of the second-order minimum
(dark spot)?
(b) What is the distance on the screen between the central
maximum and the second-order
minimum?
(c) The reason there is a dark spot at this location on the
screen is because light from one slit has
to travel further than light...
Blue light of wavelength 470 nm passes through an interference
grating with a slit spacing of0.001 mm and makes an interference
pattern on the wall.
How many bright fringes will be seen?
1-In green plants and algae the red and blue wavelengths of
light are predominantly used. Describe an experiment that can be
used to test this. 100 marks
2-Describe either 1) peat bogs or 2) cloud forests and explain
why they are important habitats for bryophytes. 100 marks
White light (ranging in wavelengths from 380 to 750 nm) is
incident on a metal with work function Wo = 2.68 eV.
1. For what range of wavelengths (from lmin to
lmax) will NO electrons be emitted?
a) Imin=
b) Imax=
A soap bubble is essentially a thin film of water surrounded by air. The colors you see in soap bubbles are produced by interference. What visible wavelengths of light are strongly reflected from a 390-nm-thick soap bubble? What color would such a soap bubble appear to be?
While the human eye responds to light with wavelengths up to
about 750 nm, it is hard to distinguish the color of different
wavelengths between 650 and 700 nm. Why?