PSH Light Review

This unit is the longest one and has the most content on the exam. It also includes a lot of stuff about colors and some fun facts about cancer!

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Last updated: May 19, 2026

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Hint	Answer
Electromagnetic radiation (EMR) is the defenition of ____.	Light
Light is travels as a ____ wave.	Transverse
Speed of light. (m/s)	300,000,000 m/s
Light can travel even when there is no ____ present, like in space.	Medium
On the low end of the Electromagnetic Spectrum light has ___ frequency and energy.	Low
On the low end of the Electromagnetic Spectrum light has ___ wavelength.	Long
On the right of the Electromagnetic Spectrum light has ___ frequency and energy.	High
On the high end of the Electromagnetic Spectrum light has ___ wavelenth.	Short
What is the primary difference between the different types of light?	Frequency
Something being ____ means that light can clearly pass through it.	Transparent
Something being ____ means that light can pass through it but not clearly.	Translucent
Something being ____ means that no light can pass through it.	Opaque
What celestial body produces all types of light?	Stars
What type of light can resonate with water and can boil it?	Microwaves

Hint	Answer
The spectrum of visible light can be represented by this acronym. (The colors of the Rainbow according to Science)	ROYGBIV
This type of high frequency light, which our atmosphere is not opaque to, can give you sunburns.	Ultraviolet Light
This word means "Crab" in Greek.	Cancer
What type of light causes cancer?	High Frequency Light
What is the term for a tumor that is harmful to the body?	Malignant
What is the term for a tumor that is "safe"?	Benign
What is the term for when a tumor breaks off and starts spreading through the body?	Metastasis
When light is produced from a light source, such as the sun, it is called ____ light.	Emitted
When light is bounced off something into your eye it is called ____ light.	Reflected
What color reflects all frequencies of visible light?	White
What color absorbs all frequencies of visible light?	Black
How do we see the different colors of light? (Color by ___)	Color by Addition
How do we see the different colors of pigment? (Color by ___)	Color by Subtration
The primary colors of light are Red, ____, and Blue.	Green

Hint	Answer
The primary colors of pigment are Cyan, ____, and Magenta.	Yellow
Yellow pigment absorbs ____ light and reflects reflects the other two primary colors of light.	Blue
What type of mirror is flat and only produces virtual images?	Plane Mirror
What type of mirror is curved and produces real images at the focal point?	Concave
What type of mirror is curved but has no focal point and only produces virtual images?	Convex
When spearfishing, where do you want to aim your blow to catch the fish?	Deeper and Further Away
What does a lens do?	Bends Light
What type of lens corrects nearsightedness?	Concave
What type of lens corrects farsightedness?	Convex
What is the sharpness of your vision called?	Visual Acuity
Who proved that light is a wave because it experiences interferance like a wave? (Double Slit Experiment)	Thomas Young
Who proved that light is a particle because it can eject electrons?	Albert Einstien
What is it called when light is both a particle and a wave?	Wave-Particle Duality
What is it called when filters block a certain orientation of light? (This also proves that light behaves like a wave)	Polarization