_____ objects radiate EM waves.
At low temperatures we cannot see the EM waves.
- Stars are hot enough to emit visible light, humans are not.
Give this one a try later!
All
- When light passes from a medium with a high index of refraction (water) to a medium
with a low value (air) the light speeds up and bends away from the normal.
- Part of the incident ray is reflected back into the original medium.
Give this one a try later!
Internal Reflection
,_______ __________ has the longest wavelength in the visible spectrum and diffracts best as
a result with a ballpark wavelength of approximately 750nm.
Give this one a try later!
red light
The distance from the center of a lens to the focal point; the distance
from the lens or mirror to the focal point. It is dependent on the
refractive index of the material and the shape of the lens.
Give this one a try later!
Focal Length
1. Draw the mirror showing the principal axis, the centre of curvature, and the principal
focus.
2. Place a vertical arrow on the principal axis to indicate the position, size and
orientation of the object.
3. Draw two rays from the tip of the arrow to the mirror. Where these two rays meet
(real image) or appear to diverge from (virtual image) is the position of the image. Any
two of the following three rays may be used:
- The ray directly parallel to the principal axis will reflect through or appear to have
come from F.
- The ray directed F will reflect parallel to the principal axis.
- A ray passing through the centre of curvature is reflected bac along the same path.
Give this one a try later!
, How to draw a ray diagram for mirrors
black body results in ultraviolet catastrophe-ideal black-body emits infinite
energy-only at long wavelenghts
- First approximation if the energy of a blackbody radiator.
- Treated all vibrations as equally likely.
- At low frequencies it agreed well with observations, but at high frequencies it was a
spectacular failure.
Give this one a try later!
Rayleigh-Jeans Law
The larger the scattering angle, the _________ the change in wavelength.
Give this one a try later!
greater
Slope = Planck's Constant
X-Intercept =. threshold frequency
Y-Intercept. = work function (negative value)
Give this one a try later!
, Graphical Analysis of Kinetic Energy vs Frequency
The ____________ _______ occurs when light energy contacts a metal and releases electrons
from. the metal. This can be done by using two parallel plates enclosed in an
evacuated glass tube. This may be called a phototube.
Give this one a try later!
Photoelectric Effect (Einstein)
- Converging lenses have positive focal lengths, diverging lenses have negative focal
lengths.
- Negative image distance means it is a virtual image.
- Object distance CANNOT BE NEGATIVE (only positive object distances).
- Positive height is upright (virtual image) and negative height is upside down (real
image).
Give this one a try later!
Sign Convention for Lenses
6.63 x 10^-34 Js OR 4.14 x 10^-15 eVs
Give this one a try later!
Planck's Constant
At low temperatures we cannot see the EM waves.
- Stars are hot enough to emit visible light, humans are not.
Give this one a try later!
All
- When light passes from a medium with a high index of refraction (water) to a medium
with a low value (air) the light speeds up and bends away from the normal.
- Part of the incident ray is reflected back into the original medium.
Give this one a try later!
Internal Reflection
,_______ __________ has the longest wavelength in the visible spectrum and diffracts best as
a result with a ballpark wavelength of approximately 750nm.
Give this one a try later!
red light
The distance from the center of a lens to the focal point; the distance
from the lens or mirror to the focal point. It is dependent on the
refractive index of the material and the shape of the lens.
Give this one a try later!
Focal Length
1. Draw the mirror showing the principal axis, the centre of curvature, and the principal
focus.
2. Place a vertical arrow on the principal axis to indicate the position, size and
orientation of the object.
3. Draw two rays from the tip of the arrow to the mirror. Where these two rays meet
(real image) or appear to diverge from (virtual image) is the position of the image. Any
two of the following three rays may be used:
- The ray directly parallel to the principal axis will reflect through or appear to have
come from F.
- The ray directed F will reflect parallel to the principal axis.
- A ray passing through the centre of curvature is reflected bac along the same path.
Give this one a try later!
, How to draw a ray diagram for mirrors
black body results in ultraviolet catastrophe-ideal black-body emits infinite
energy-only at long wavelenghts
- First approximation if the energy of a blackbody radiator.
- Treated all vibrations as equally likely.
- At low frequencies it agreed well with observations, but at high frequencies it was a
spectacular failure.
Give this one a try later!
Rayleigh-Jeans Law
The larger the scattering angle, the _________ the change in wavelength.
Give this one a try later!
greater
Slope = Planck's Constant
X-Intercept =. threshold frequency
Y-Intercept. = work function (negative value)
Give this one a try later!
, Graphical Analysis of Kinetic Energy vs Frequency
The ____________ _______ occurs when light energy contacts a metal and releases electrons
from. the metal. This can be done by using two parallel plates enclosed in an
evacuated glass tube. This may be called a phototube.
Give this one a try later!
Photoelectric Effect (Einstein)
- Converging lenses have positive focal lengths, diverging lenses have negative focal
lengths.
- Negative image distance means it is a virtual image.
- Object distance CANNOT BE NEGATIVE (only positive object distances).
- Positive height is upright (virtual image) and negative height is upside down (real
image).
Give this one a try later!
Sign Convention for Lenses
6.63 x 10^-34 Js OR 4.14 x 10^-15 eVs
Give this one a try later!
Planck's Constant
