NAO VOLUME 2 BANK MOST EXAM QUESTIONS WILL COME FROM
HERE /ALREADY GRADED A+
The 2 theories of light that we primarily discuss are the _________ & _________.
- ANSWER-Corpuscular & Electromagnetic Wave
Which light theory explains shadows? - ANSWER-Corpuscular Theory
Which theory explains rainbows? - ANSWER-Electromagnetic Wave Theory
What is the size of a nanometer? - ANSWER-1 billionth of a meter
What is the speed of light in air? - ANSWER-186,000 miles per second
A single band of light from a single point on light source is called a __________. -
ANSWER-Ray
The visible spectrum is only a small portion of the electromagnetic spectrum and
consists of wavelengths from __________ to ___________. - ANSWER-380 nm to
750 nm
Which category of invisible light is the major cause of skin and ocular damage? -
ANSWER-UV-A
Which color has the longest wavelength? - ANSWER-Red
How is the wavelength of light measured? - ANSWER-Crest to crest OR Trough to
Trough
1
, Who introduced the electro-magnetic wave theory? - ANSWER-Maxwell
Why do we see a banana as yellow? - ANSWER-Because the CONES in our eyes
receive the light waves. The eyes see the REFLECTION of color.
What does HEV stand for? - ANSWER-High Energy Visible
Why is the sky blue? - ANSWER-Because the blue wavelength scatters the most
Absorption - ANSWER-When a ray of light enters a lens, some of the light will
not completely travel through the lenses
Deviation - ANSWER-Angle a ray of light is changed from its original path.
Diffuse Reflection - ANSWER-A reflection from a rough surface- the reflection
does not produce a clear image.
Incidence - ANSWER-The angle which a ray of light makes with the surface of a
refracting medium.
Reflection - ANSWER-The return of light when going from one medium into
another.
Refraction - 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.
2
, Speculation Reflection - ANSWER-The forming of a clear image when light
strikes a surface.
Why is the pencil red? - ANSWER-It reflects red rays back toward the eye and
absorbs all other rays of visible light.
Why is the blacktop black? - 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? - 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? -
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? - 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? - ANSWER-I=r+d
15=11+d
D=15-11
3
HERE /ALREADY GRADED A+
The 2 theories of light that we primarily discuss are the _________ & _________.
- ANSWER-Corpuscular & Electromagnetic Wave
Which light theory explains shadows? - ANSWER-Corpuscular Theory
Which theory explains rainbows? - ANSWER-Electromagnetic Wave Theory
What is the size of a nanometer? - ANSWER-1 billionth of a meter
What is the speed of light in air? - ANSWER-186,000 miles per second
A single band of light from a single point on light source is called a __________. -
ANSWER-Ray
The visible spectrum is only a small portion of the electromagnetic spectrum and
consists of wavelengths from __________ to ___________. - ANSWER-380 nm to
750 nm
Which category of invisible light is the major cause of skin and ocular damage? -
ANSWER-UV-A
Which color has the longest wavelength? - ANSWER-Red
How is the wavelength of light measured? - ANSWER-Crest to crest OR Trough to
Trough
1
, Who introduced the electro-magnetic wave theory? - ANSWER-Maxwell
Why do we see a banana as yellow? - ANSWER-Because the CONES in our eyes
receive the light waves. The eyes see the REFLECTION of color.
What does HEV stand for? - ANSWER-High Energy Visible
Why is the sky blue? - ANSWER-Because the blue wavelength scatters the most
Absorption - ANSWER-When a ray of light enters a lens, some of the light will
not completely travel through the lenses
Deviation - ANSWER-Angle a ray of light is changed from its original path.
Diffuse Reflection - ANSWER-A reflection from a rough surface- the reflection
does not produce a clear image.
Incidence - ANSWER-The angle which a ray of light makes with the surface of a
refracting medium.
Reflection - ANSWER-The return of light when going from one medium into
another.
Refraction - 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.
2
, Speculation Reflection - ANSWER-The forming of a clear image when light
strikes a surface.
Why is the pencil red? - ANSWER-It reflects red rays back toward the eye and
absorbs all other rays of visible light.
Why is the blacktop black? - 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? - 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? -
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? - 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? - ANSWER-I=r+d
15=11+d
D=15-11
3
