NAO Book 2 Exam with all Correct & 100% Verified
Answers |Actual Complete Update |Already Graded A+
The 2 theories of light that we primarily discuss are the _________ & _________. ✔Correct
Answer-Corpuscular & Electromagnetic Wave
Which light theory explains shadows? ✔Correct Answer-Corpuscular Theory
Which theory explains rainbows? ✔Correct Answer-Electromagnetic Wave Theory
What is the size of a nanometer? ✔Correct Answer-1 billionth of a meter
What is the speed of light in air? ✔Correct Answer-186,000 miles per second
A single band of light from a single point on light source is called a __________. ✔Correct
Answer-Ray
The visible spectrum is only a small portion of the electromagnetic spectrum and consists of
wavelengths from __________ to ___________. ✔Correct Answer-380 nm to 750 nm
Which category of invisible light is the major cause of skin and ocular damage? ✔Correct
Answer-UV-A
Which color has the longest wavelength? ✔Correct Answer-Red
How is the wavelength of light measured? ✔Correct Answer-Crest to crest OR Trough to
Trough
Who introduced the electro-magnetic wave theory? ✔Correct Answer-Maxwell
Why do we see a banana as yellow? ✔Correct Answer-Because the CONES in our eyes receive
the light waves. The eyes see the REFLECTION of color.
What does HEV stand for? ✔Correct Answer-High Energy Visible
Why is the sky blue? ✔Correct Answer-Because the blue wavelength scatters the most
Absorption ✔Correct Answer-When a ray of light enters a lens, some of the light will not
completely travel through the lenses
Deviation ✔Correct Answer-Angle a ray of light is changed from its original path.
, Diffuse Reflection ✔Correct Answer-A reflection from a rough surface- the reflection does not
produce a clear image.
Incidence ✔Correct Answer-The angle which a ray of light makes with the surface of a
refracting medium.
Reflection ✔Correct Answer-The return of light when going from one medium into another.
Refraction ✔Correct Answer--The bending of light when going from one medium into another.
-The angle created when a ray of light passes from one medium into another.
Speculation Reflection ✔Correct Answer-The forming of a clear image when light strikes a
surface.
Why is the pencil red? ✔Correct Answer-It reflects red rays back toward the eye and absorbs
all other rays of visible light.
Why is the blacktop black? ✔Correct Answer-It does not reflect any rays back toward your
eye; rather it absorbs them all
If a light beam passes through a green sunglass lens, why will exiting light be green? ✔Correct
Answer-The green rays are refracted through the lens and all other color rays are absorbed by
the pigments in the lens material.
When a ray of light travels from air into water, what happens to the ray of light? ✔Correct
Answer--When it is perpendicular to the surface, it slows down but does not change direction. It
is not deviated or displaced.
-When it is not perpendicular to the surface, it slows down and changes direction toward the
normal. It deviates from its original path.
What does critical angle mean? ✔Correct Answer-A light ray leaving a denser material for a
rarer material that is at an angle to the normal that results in it traveling parallel to the surface
of the material. If the angle of incidence is greater than the critical angle the ray will reflect
inside the material and will not exit into the rarer material.
If a light ray travels from air to water with an angle of incidence of 15 degrees and an angle of
refraction of 11 degrees, how much did it deviate? ✔Correct Answer-I=r+d
15=11+d
D=15-11
D=4
If a ray of light leaves the water traveling into air with an angle of incidence of 20 degrees and it
is deviated by -7 degrees, what was the angle of refraction? ✔Correct Answer-I=r+d
20=r+(-7)
Answers |Actual Complete Update |Already Graded A+
The 2 theories of light that we primarily discuss are the _________ & _________. ✔Correct
Answer-Corpuscular & Electromagnetic Wave
Which light theory explains shadows? ✔Correct Answer-Corpuscular Theory
Which theory explains rainbows? ✔Correct Answer-Electromagnetic Wave Theory
What is the size of a nanometer? ✔Correct Answer-1 billionth of a meter
What is the speed of light in air? ✔Correct Answer-186,000 miles per second
A single band of light from a single point on light source is called a __________. ✔Correct
Answer-Ray
The visible spectrum is only a small portion of the electromagnetic spectrum and consists of
wavelengths from __________ to ___________. ✔Correct Answer-380 nm to 750 nm
Which category of invisible light is the major cause of skin and ocular damage? ✔Correct
Answer-UV-A
Which color has the longest wavelength? ✔Correct Answer-Red
How is the wavelength of light measured? ✔Correct Answer-Crest to crest OR Trough to
Trough
Who introduced the electro-magnetic wave theory? ✔Correct Answer-Maxwell
Why do we see a banana as yellow? ✔Correct Answer-Because the CONES in our eyes receive
the light waves. The eyes see the REFLECTION of color.
What does HEV stand for? ✔Correct Answer-High Energy Visible
Why is the sky blue? ✔Correct Answer-Because the blue wavelength scatters the most
Absorption ✔Correct Answer-When a ray of light enters a lens, some of the light will not
completely travel through the lenses
Deviation ✔Correct Answer-Angle a ray of light is changed from its original path.
, Diffuse Reflection ✔Correct Answer-A reflection from a rough surface- the reflection does not
produce a clear image.
Incidence ✔Correct Answer-The angle which a ray of light makes with the surface of a
refracting medium.
Reflection ✔Correct Answer-The return of light when going from one medium into another.
Refraction ✔Correct Answer--The bending of light when going from one medium into another.
-The angle created when a ray of light passes from one medium into another.
Speculation Reflection ✔Correct Answer-The forming of a clear image when light strikes a
surface.
Why is the pencil red? ✔Correct Answer-It reflects red rays back toward the eye and absorbs
all other rays of visible light.
Why is the blacktop black? ✔Correct Answer-It does not reflect any rays back toward your
eye; rather it absorbs them all
If a light beam passes through a green sunglass lens, why will exiting light be green? ✔Correct
Answer-The green rays are refracted through the lens and all other color rays are absorbed by
the pigments in the lens material.
When a ray of light travels from air into water, what happens to the ray of light? ✔Correct
Answer--When it is perpendicular to the surface, it slows down but does not change direction. It
is not deviated or displaced.
-When it is not perpendicular to the surface, it slows down and changes direction toward the
normal. It deviates from its original path.
What does critical angle mean? ✔Correct Answer-A light ray leaving a denser material for a
rarer material that is at an angle to the normal that results in it traveling parallel to the surface
of the material. If the angle of incidence is greater than the critical angle the ray will reflect
inside the material and will not exit into the rarer material.
If a light ray travels from air to water with an angle of incidence of 15 degrees and an angle of
refraction of 11 degrees, how much did it deviate? ✔Correct Answer-I=r+d
15=11+d
D=15-11
D=4
If a ray of light leaves the water traveling into air with an angle of incidence of 20 degrees and it
is deviated by -7 degrees, what was the angle of refraction? ✔Correct Answer-I=r+d
20=r+(-7)
