BTEC Applied Science Unit 2 Assignment C -
Chromatography
Refraction - ANSWER The change in direction of a wave due to a change in its
speed.
Light ray in glass block - ANSWER
The light ray bends _______ from the normal when travelling from _____ optically
dense to ____ optically dense (e.g., air to glass). - ANSWER towards, less, more
The light ray bends _______ from the normal when travelling from _____ optically
dense to ____ optically dense (e.g., glass to air). - ANSWER away, more, less
When parallel to the ______, refraction appears to not apply since the ray continues
along the ______. Refraction (as in change of _____) still occurs it just has no effect
on the ________. - ANSWER normal, normal, speed, direction
Incident and emergent rays are... - ANSWER parallel.
Refractive index - ANSWER Measure of the bending of a ray of light when passing
from one medium into another (relative to a vacuum).
For a range of angles, we find that the result is a constant - known as the... -
ANSWER refractive index.
How do you calculate refractive index through the angle of incidence and the angle
of refraction? - ANSWER sin i / sin r
Snell's law states that the _____ of sines of the angles of incidence and __________
is equivalent to the ratio of phase __________ in the two _____, or equivalent to the
_________ of the ratio of the indices of refraction. - ANSWER ratio, refraction,
velocities, media, reciprocal
Snell's law overall equation... - ANSWER c/v = sin i/sin r
How do you calculate the refractive index of wave that transitions from a vacuum to a
substance. - ANSWER c / v
White light is made up of a continuous range of wavelengths covering the whole
spectrum from (longest to shortest colours) ... - ANSWER red (650 nm) to violet
(350nm).
The shorter the wavelength the greater the __________ and so a glass prism will
refract different coloured lights by ________ amounts - ANSWER refraction, different
Chromatography
Refraction - ANSWER The change in direction of a wave due to a change in its
speed.
Light ray in glass block - ANSWER
The light ray bends _______ from the normal when travelling from _____ optically
dense to ____ optically dense (e.g., air to glass). - ANSWER towards, less, more
The light ray bends _______ from the normal when travelling from _____ optically
dense to ____ optically dense (e.g., glass to air). - ANSWER away, more, less
When parallel to the ______, refraction appears to not apply since the ray continues
along the ______. Refraction (as in change of _____) still occurs it just has no effect
on the ________. - ANSWER normal, normal, speed, direction
Incident and emergent rays are... - ANSWER parallel.
Refractive index - ANSWER Measure of the bending of a ray of light when passing
from one medium into another (relative to a vacuum).
For a range of angles, we find that the result is a constant - known as the... -
ANSWER refractive index.
How do you calculate refractive index through the angle of incidence and the angle
of refraction? - ANSWER sin i / sin r
Snell's law states that the _____ of sines of the angles of incidence and __________
is equivalent to the ratio of phase __________ in the two _____, or equivalent to the
_________ of the ratio of the indices of refraction. - ANSWER ratio, refraction,
velocities, media, reciprocal
Snell's law overall equation... - ANSWER c/v = sin i/sin r
How do you calculate the refractive index of wave that transitions from a vacuum to a
substance. - ANSWER c / v
White light is made up of a continuous range of wavelengths covering the whole
spectrum from (longest to shortest colours) ... - ANSWER red (650 nm) to violet
(350nm).
The shorter the wavelength the greater the __________ and so a glass prism will
refract different coloured lights by ________ amounts - ANSWER refraction, different
