To investigate the refraction of white light [lo 2.1, lo 2.4]
Splitting up of white light:
This phenomenon can be demonstrated in the classroom by directing a beam of light through a PRISM. A prism is a triangular bar of glass or perspex. When this is done, you will see that white light is a combination of all the colours of the rainbow – this range of colours is known as the SPECTRUM.
Red, having the longest wavelength, will experience the least refraction. Blue light, on the opposite side of the
SPECTRUM , having the shortest wavelength, will show the greatest degree of refraction.
Assignment 1:
Ask your educator to demonstrate refraction.
Complete the sketch that follows by using coloured pencils to indicate the spectrum.
Assessment of the Sketch of the Spectrum
Were you able to complete the sketch correctly?
[LO 2.1]
Spectacles
relieve the problems of people who suffer from short-sightedness or long-sightedness.
Assignment 2:
Differentiate between:
Near-sightedness:
L ong-sightedness:
The lenses of spectacles can be like the reflective surfaces you learnt about earlier, convex or concave. These lenses are shaped on both sides and are therefore biconvex or biconcave.
This shape is __________________________________________
Draw these lenses, showing the refraction that results from each type of lens. You might need to ask your educator’s help.
Assessment of the Sketch of the Spectrum
Were you able to complete the sketch correctly?
[LO 2.4]
Assessment
LO 2: Constructing Science Knowledge:
The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.
This is evident when the learner:
recalls meaningful information;
interprets information;
2.4 applies knowledge.
Memorandum
SPLITTING UP OF WHITE LIGHT:
Assignment 1:
This phenomenon can be demonstrated in the classroom by directing a beam of light through a PRISM.
A prism is a triangular bar of glass or perspex.
When this is done, you will see that white light is a combination of all the colours of the rainbow – this range of colours is known as the
SPECTRUM .
The different colours that are combined to form white light do not move at the same speed.
Red, having the longest wavelength, will experience the least amount of refraction. Blue light, on the opposite side of the
SPECTRUM , having the shortest wavelength, will show the greatest degree of refraction.
Complete the sketch that follows by using coloured pencils to indicate the spectrum.
Spectrum colours:
Violet, blue, green, yellow, orange, red
Spectacles relieve the problems of people who suffer from shortsightedness of farsightedness
.
NEAR-SIGHTEDNESS : People with this condition can see close objects well, but objects in the distance are unclear.
LONG-SIGHTEDNESS : People with this condition can see distant objects clearly but find it difficult to focus on nearby objects and find reading difficult, for instance. Older people, in particular, develop this problem.
The lenses of spectacles can be shaped, like the reflective surfaces about which you have learnt earlier, to be convex or concave. These lenses are shaped on both sides and are therefore
biconvex
or biconcave
.
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
