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Review Questions: Understanding the Properties and Behavior of Light, Exams of Physics

Kent State University College of Podiatric Medicine (KSUCPM)Physics

A series of review questions designed to help students understand the fundamental concepts of light, including its interaction with different materials, refraction, and the perception of colors. The questions cover topics such as the difference between transparent, translucent, and opaque materials, the effects of a prism on light, the distinction between pure colors and white light, and the role of reflection and absorption in the perception of colors.

Typology: Exams

2021/2022

Uploaded on 09/12/2022

amlay
amlay 🇺🇸

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ReviewQuestions:Light
1. DescribethedifferencebetweenTransparent,Translucent,andOpaque
andgiveanexampleofeach.
Transparent:materialsthatallowlighttopassthrough.Examplesmayvary
(water,glass,etc.)
Translucent:materialsthatallowsomelightpassthroughandsometobe
reflected.Examplesmayvary(waxpaper,frostedglass,etc.)
Opaque:materialsthatdonotallowlighttopassthrough.Thelightisabsorbed
orreflected.Examplesmayvary(mirror,wood,metal,etc.)

2. Whathappenswhenlightpassesthroughaprism?
Lightisrefracted.Whitelightbendsasitenterstheglassprismandseparates
intothecolorsofthevisiblelightspectrum.
3. Whatis“purecolour”vs.“whitelight”?
Whitelightisthemixtureofallwavelengthsofcolouredlight.Purecolourisa
singlewavelengthoflightthatcorrespondstoagivencolour.
4. Howdoweseespecificcolours?Drawanexamplethatdemonstrates
yourunderstanding.
Whitelighthitstheobject,thewavelengthoflightthatisreflectedfromtheobject
entersyoureyesandallotherwavelengthsoflightareabsorbedbytheobject
andtransformedintoheat.Diagramsofexamplesareavailableinyournotes.
5. Whydoesblackclothingkeepyouwarmerthatwhiteclothing?
Blackobjectsareblackbecauseallcoloursoflightareabsorbed.Theradiant
energyisabsorbedintotheobjectandtransformedintoheat.
6. Howdoeslighttravel?Lightismadeupofphotons,whichtravelinthe
formofwaves.Thesewavestravelinastraightline(calledaray).
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Download Review Questions: Understanding the Properties and Behavior of Light and more Exams Physics in PDF only on Docsity!

  1. Describe the difference between Transparent, Translucent, and Opaque and give an example of each.

Transparent: materials that allow light to pass through. Examples may vary (water, glass, etc.)

Translucent: materials that allow some light pass through and some to be reflected. Examples may vary (wax paper, frosted glass, etc.)

Opaque: materials that do not allow light to pass through. The light is absorbed or reflected. Examples may vary (mirror, wood, metal, etc.)

  1. What happens when light passes through a prism?

Light is refracted. White light bends as it enters the glass prism and separates into the colors of the visible light spectrum.

  1. What is “pure colour” vs. “white light”?

White light is the mixture of all wavelengths of coloured light. Pure colour is a single wavelength of light that corresponds to a given colour.

  1. How do we see specific colours? Draw an example that demonstrates your understanding.

White light hits the object, the wavelength of light that is reflected from the object enters your eyes and all other wavelengths of light are absorbed by the object and transformed into heat. Diagrams of examples are available in your notes.

  1. Why does black clothing keep you warmer that white clothing?

Black objects are black because all colours of light are absorbed. The radiant energy is absorbed into the object and transformed into heat.

  1. How does light travel? Light is made up of photons, which travel in the form of waves. These waves travel in a straight line (called a ray).
  1. How is blue light and red light different from one another? Describe the types of waves that carry these two colours of light.

Red light is low energy light (longer wavelength) while blue light is high energy light (shorter wavelength).

  1. Can light be reflected and absorbed at the same time? Explain your answer by providing one example.

All objects reflect light from their surroundings which make them visible. However, opaque objects (such as black objects) also absorb light energy.

  1. What is diffuse reflection? Draw an example that demonstrates your understanding.

Diffuse reflection is when light is reflected off of a surface that is not smooth, causing that light to bounce off of that surface at unequal angles.

  1. Can you see your reflection on a surface that allows for diffuse reflection?

Because the surface is not smooth (the angles of incidence/incoming light and the angles of reflection are not equal) a clear image cannot be seen.

  1. How is a shadow formed?

When light hits an opaque object, it cannot pass through that object. The light around the object continues to travel in a straight line, forming a shadow.

  1. Describe what refraction is in your own words. Draw an example that demonstrates your understanding.