Physics Test On Light! Trivia
.
- 1.Light is a form of energy. Light travels from the Sun to the Earth. _______________________ and ________________________________________ are other examples of light on Earth. Often sources of light give off heat.
- A.
Fire and televisions
- B.
Lightbulbs and televisions
- C.
Fire and computers
- D.
Computers anlight bulbs
- E.
Fire and lightbulbs
- 2.Usually, a source of light gives off white light. White light is actually made up of ____________ colors. These colors range from red to violet.
- A.
One
- B.
Five
- C.
All
- D.
Two
- E.
No
- 3.All light is made of waves. A __________________________________ is the distance from the top of one wave to the top of the next wave.
- A.
Wavelength
- B.
Distance length
- C.
Top point
- D.
High top
- E.
High point
- 4.A ________________________ is a range of light waves with different wavelengths and amounts of energy.
- A.
Bear
- B.
Color
- C.
Wavelength
- D.
Spectrum
- 5.High-energy waves have ___________________ wavelengths and low-energy waves have _______________ ones.
- A.
Taller and shorter
- B.
Shorter and longer
- C.
Longer and faster
- D.
Longer and shorter
- E.
Shorter and taller
- 6.______________________ are places where light does not fall. They form when light is blocked. The light strikes an object but can't pass through it. It then has the shape of whatever is blocking the light.
- A.
Shadows
- B.
Forests
- C.
Houses
- D.
Chairs
- E.
Planets
- 7.Light travels in straight lines or ___________________. Shadows prove this. Light spreads out from a source in all directions, however it can't ____________________.
- A.
Rays and bounce off
- B.
Bend and rays
- C.
Rays and eat
- D.
Bounce off and rays
- E.
Rays and bend
- 8.Shadow size depends on where the light source is. The closer an object is to a light source, the ________________ the shadow.
- A.
Shorter
- B.
Smaller
- C.
Bigger
- D.
Taller
- E.
Skinnier
- 9.Most of the light that reaches your eyes is _____________________ light. Reflection occurs when light strikes a surface and __________________________ off.
- A.
Bounced and refraction
- B.
Reflected and bounces
- C.
New and bounces
- D.
Refraction and bounces
- E.
Old and bounces
- 10.Light changes direction when it is reflected off a surface. The light source going towards a surface has oncoming rays. These rays strike the surface such as a mirror at an _________________________ angle. Outgoing rays are those reflected by the surface. They are reflected at an angle called an ____________________ angle.
- A.
Outward and forward
- B.
Outgoing and incoming
- C.
Forward and outward
- D.
Incoming and outgoing
- E.
Cat and dog
- 11.The Law of Reflection says that with reflection, the ______________________ angle is equal to the _____________________ angle.
- A.
Shark and whale
- B.
Oncoming and outgoing
- C.
Forward and outward
- D.
Outgoing and oncoming
- E.
Outward and forward
- 12.Refraction is the _________________ of light as it ____________________ from one material to another.
- A.
Bending and bounces
- B.
Passing and bends
- C.
Bouncing and bends
- D.
Tree and grass
- E.
Bending and passes
- 13.Most materials ____________________ the light falling on them but some materials allow light to pass through them. Refraction happens when light passes through glass, water, light plastic, and other _________________________ objects.
- A.
Reflect and opaque
- B.
Translucent and reflect
- C.
Reflect and transparent
- D.
Opaque and reflect
- E.
Reflect and translucent
- 14.Light travels at different speeds in different materials. The thicker a material, the _______________ light travels through it. As light travels more slowly it bends more.
- A.
Slower
- B.
Faster
- C.
More
- D.
Less
- 15.Lenses are tools that refract light. They are used to gather light rays or to spread them apart. There are two kinds of lenses: ________________________ and _______________________.
- A.
Convex and conrex
- B.
Concave and concone
- C.
Convex and concone
- D.
Convex and concave
- 16.Convex lenses bulge in he middle. A convex lens brings rays of light together. A concave lens curves inward. A concave lens spreads light ray apart.
- A.
True
- B.
False
- 17.When light reaches your eye it first passs through a thin, clear tissue overing each eye called the ________________________.
- A.
Pupil
- B.
Cornea
- C.
Retina
- D.
Optic nerves
- 18.Then light passes through an opening called the _____________________. It's the black spot in the center of your eye.
- A.
Cornea
- B.
Optic nerves
- C.
Pupil
- D.
Retina
- 19.After light passes through your pupil, it travels through your lenses. Each lens focuses light on the back of your eye. A tissue called the __________________ covers the back of your eye.
- A.
Lens
- B.
Cornea
- C.
Optic nerves
- D.
Pupil
- E.
Retina
- 20.The images focused on your retina are actually upside down. Your retinas change the image into signals that travel along your _____________________________ to your brain. Your brain sees the picture rightside up.
- A.
Optic nerves
- B.
Retina
- C.
Pupil
- D.
Lens
- E.
Cornea
- 21.__________________________ and ___________________________ are not true color. The either reflect all colors or absorb all colors causing them to be the color they are.
- A.
Orange and pink
- B.
Yellow and blue
- C.
Purple and brown
- D.
Pink and orange
- E.
White and black
- 22.Materials that block like wood, metal, and people are all opaque. Transparent materials let light pass through them like glass and water.Translucent materials reflect some light and let the rest pass through. Cloudy looking plastics are translucent.
- A.
True
- B.
False
- 23.Lasers are tubes of __________________. They use electricity to produce thin beams of light that have only 1 wavelength. All rays of a laser travel in the same direction making for a very intense, high-energy beam.
- A.
Liquid
- B.
Gas
- C.
Solids
- 24.Optical fibers are tubes made of glass or plastic. They keep the _______________________ energy inside the entire length of their fibers.
- A.
Heat
- B.
Mechanical
- C.
Light
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