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A glass block of thickness 12 cm is placed on a mark placed on a plain paper. The mark is viewed normally through the glass. Calculate the apparent depth of the mark and hence the vertical displacement. (refractive index of glass is 1.5)
asked
Aug 23, 2021
in
Physics Form 1
refraction of light
refractive index
0
votes
1
answer
Given that the refractive index of diamond is 2.42 and the velocity of light in air 3.0 X 108 m/s,calculate the velocity of light in diamond.
asked
Aug 23, 2021
in
Physics Form 3
refraction of light
refractive index
0
votes
1
answer
Define the term total internal reflection as used in refraction
asked
Aug 23, 2021
in
Physics Form 3
refraction of light
total internal reflection
0
votes
1
answer
Two plane mirrors M1 and M2 and inclined to each other and a ray of light shone on M1 as shown:Show on the diagram the path followed by the ray until it is reflected by M2
asked
Aug 23, 2021
in
Physics Form 1
rectilinear propagation of light and reflection at planes
problems on mirrors inclined at an angle
0
votes
1
answer
The figure below shows an object placed in front of a concave mirror. On the same diagram, locate the position of the image
asked
Aug 23, 2021
in
Physics Form 2
reflection at curved surface
location of images formed
magnification formula
0
votes
1
answer
A person stands between two high walls d metres apart. He stands 400m from the nearer wall. He blows a whistle and hears two echoes, the first one after 2.5 seconds and the second one 2 seconds later. Determine:
asked
Aug 23, 2021
in
Physics Form 2
sound
speed of sound by echo method
0
votes
1
answer
The figure below shows the displacement-time graph of a wave travelling at 0.4ms−1 displacement time graph of wave travelling at 0.4 How many complete waves are shown? Determine the period time of the wave
asked
Aug 23, 2021
in
Physics Form 2
waves
period time
0
votes
3
answers
Define an echo.
asked
Aug 23, 2021
in
Physics Form 2
sound
echo
0
votes
1
answer
State three methods of making magnets.
asked
Aug 23, 2021
in
Physics Form 2
magnetism
methods of making magnets
0
votes
1
answer
In estimating the height of a tree, the following measurements were recorded: Height of the rod = 180cm. Length of the shadow of the rod = 116cm Length of the shadow of the tree = 420cm Calculate the height of the tree.
asked
Aug 23, 2021
in
Physics Form 1
measurements
rectilinear propagation of light and reflection at planes
0
votes
1
answer
In the figure the arrow indicates the direction of the current in the conductor. Sketch on the diagram the magnetic field pattern due to the current.
asked
Aug 23, 2021
in
Physics Form 2
magnetism
magnetic field patterns
0
votes
1
answer
Complete the figure below to show the position of the image of object A in the mirror M.
asked
Aug 23, 2021
in
Physics Form 1
rectilinear propagation of light and reflection at planes
images formed by plane minors
0
votes
1
answer
A parent comes to you seeking your advice whether to use a white shawl or a black one to wrap her child to kept it warm. Which shawl would you advice to use and why?
asked
Aug 23, 2021
in
Physics Form 1
heat transfer
modes of heat transfer
0
votes
3
answers
The diagram in figure 7 below shows one method of making a magnet. What polarity is at X and Y when the switch is closed.
asked
Aug 23, 2021
in
Physics Form 2
magnetic effect of electric current
0
votes
1
answer
Draw the magnetic field pattern around the arrangement shown below
asked
Aug 23, 2021
in
Physics Form 2
magnetism
magnetic field patterns
0
votes
2
answers
What is dispersion of light?
asked
Aug 23, 2021
in
Physics Form 3
refraction of light
dispersion of light
0
votes
1
answer
The diagram below shows a current carrying conductor placed in a magnetic field. Sketch the resulting magnetic field pattern.
asked
Aug 23, 2021
in
Physics Form 2
magnetism
magnetic field patterns
0
votes
1
answer
State two defects of a simple cell.
asked
Aug 23, 2021
in
Physics Form 1
cells and simple circuits
0
votes
1
answer
A hockey player trains on a nylon fiber surface. As he runs around, his shoes rub against the surface and he becomes positively charged.
asked
Aug 23, 2021
in
Physics Form 1
electrostatics
electrostatic charging of objects by rubbing
0
votes
2
answers
The figure below shows a ray of light incident on a plane mirror. What is the angle of reflection?
asked
Aug 23, 2021
in
Physics Form 1
rectilinear propagation of light and reflection at planes
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