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10_Phys Summative Unit 3 Trim 2
By Lester Orellana
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Last updated almost 6 years ago
30 questions
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Note from the author:
Waves, index of refraction
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Question 1
1.
Critical Angle is
When all incident light has a refracted angle of 90º
When an incident light has a refracted angle of 90º in a lighter medium
When an incident light has a refracted angle of 90º in a denser medium
When sound makes 90º
Question 2
2.
Snell's law is
when only the sine of the incident angle is proportional (constant)
when the sine of first angle is equal to the refractive index of the second
when the sine of second angle is equal to the refractive index of the second
when the sines of the incident and refractive angles are proportional (constant)
Question 3
3.
Is the line that is perpendicular to the separation of the 2 media.
Boundary line
Normal Line
refractive angle line
Incident angle line
Question 4
4.
Speed of light is
speed of electromagnetic wave in air.
speed of electromagnetic wave in a light medium.
speed of electromagnetic wave in vacuum.
Question 5
5.
We see objects because ...
all the objects are non-luminous
non-luminous objects reflect light and gets to our eyes.
objects capture their own light and gets to our eyes.
light is hitting on them without bouncing off.
Question 6
6.
Electromagnetic Spectrum is ...
A full range of all electromagnetic waves and their limitations
A full range of all electromagnetic waves and their effects/applications
A full range of all electromagnetic waves and their origins
Question 7
7.
The gamma rays are so harmful because ...
it has high frequency and is a transverse wave
it has high wavelength and is a longitudinal wave
it has high frequency and is a longitudinal wave
it has high wavelength and is a transverse wave
Question 8
8.
Infrared waves have ...
higher frequency than visible light and used in remote controls for appliances.
lower frequency than visible light and not used in remote controls for appliances.
higher frequency than visible light and not used in remote controls for appliances.
lower frequency than visible light and used in remote controls for appliances.
Question 9
9.
Optical fibres are ...
Long, thin strands of glasses carrying electrical signals in the form of pulses light emitted by an LED (light-emitting diode)
Long, thin strands of glasses carrying digital signals in the form of pulses light emitted by an LED (light-emitting diode)
Question 10
10.
Longitudinal waves ...
Carry the energy backwards and upwards related to the wave propagation
Carry the energy backwards and forwards related to the wave propagation
Carry the energy perpendicular to the wave propagation
Question 11
11.
Difference of Frequency and Hertz (frequency unit) is
one is waves per unit time and the other is waves in one second.
one is waves per unit time and the other is waves in one meter.
one is waves per unit time and the other is 1 wave per unit time
one is waves per unit time and the other is 1 wave per distance time
Question 12
12.
Refraction of any wave is ...
When incident angle is reflected completely
just when any wave slows down
When incident angle slows down
just when any wave slows down and changes its direction
Question 13
13.
Sound waves are caused by vibrations, are longitudinal waves, need a material to travel through, can be diffracted, etc. These are some of the ...
nature of longitudinal waves
nature of ocean waves
nature of sound waves
Question 14
14.
Speed of sound depends on ...
Pressure, temperature of the air and type of material (medium)
temperature of air, type of material (medium), and altitude.
temperature of air, altitude, pressure of the air.
Pressure of the air and type of material (medium).
Question 15
15.
Scanning the womb of a pregnant woman is one of the applications of:
reflection of sounds with frequency higher than 20,000 Hz
Refraction of the sound
reflection of sounds with frequency lower than 20,000 Hz
Diffraction of the sound
Question 16
16.
Refraction of light is ...
Bending the light inside a denser medium.
Bending the reflected light inside a denser medium
Bending the incident light
Bending the refracted light
Question 17
17.
Total Internal Reflection is ...
When an incident angle in a denser medium is greater than its critical angle.
When an incident angle in a lighter medium is greater than its critical angle.
When an incident angle in a lighter medium is greater than its refractive angle.
When an incident angle in a denser medium is greater than its refractive angle.
Question 18
18.
Photons are ...
energized particles that only make the gamma rays.
energized particles that only make the visible light waves.
energized particles that make the electromagnetic waves.
energized particles that make the longitudinal waves.
Question 19
19.
Amplitude of a wave is ...
maximum displacement of wave from equilibrium position
maximum distance from crest to trough
maximum ditance of wave from equilibrium position
maximum displacement from crest to trough
Question 20
20.
Diffraction is ...
When waves bend around the sides of an obstacles.
When waves slow down in a denser medium.
When waves spread out after passing through a gap.
When waves bend around the sides of an obstacles, or spread out after passing through a gap.
Question 21
21.
If we say that an Electromagnetic wave has high frequency means ...
their wavelength is larger.
their wavelength is smaller.
have greater distance between crest to crest.
have greater time between crest to crest.
Question 22
22.
The infrared waves are dangerous if ...
we increase their period
we increase their amplitude
we increase their frequency
we increase their wavelength
Question 23
23.
According to this picture:
in a smaller gap, there is a lot of diffraction.
In a smaller gap, there is no much diffraction
in a samller gap, the wavelength decreases
in a smaller gap, the wavelength increases
Question 24
24.
Why can we hear the sound from the other side of a wall?
by refraction of sound
by reflection of sound
by diffraction of sound
Question 25
25.
This picture is an example of:
reflection of sound
refraction of sound
diffraction of sound
Question 26
26.
From this picture, the amplitude is:
2.0 cm
4.0 cm
4.0 m
2.0 m
Question 27
27.
From this picture, What is the row that is impossible to represent?
Amplitude
Wavelength
Period
Distance from crest to trough
Question 28
28.
From this picture, What is the distance to complete one full oscillation?
its wavelength is 2 cm
its period is 2 m
Its wavelength is 2 m
its period is 2 cm
Question 29
29.
The wave moves from left to right, which arrow represents the direction of the velocity of particle marked P?
A
D
B
C
Question 30
30.
... or what are the characteristics of the refracted ray in this example?
B
D
A
C