Light And Colour Web Quest
To revise and rediscover the concepts of light and colour from the past few weeks.
Questions and Answers
- 1.
What do we call the spectrum that includes gamma rays, UV, visible light, infrared and radio waves?
Correct Answer
Electromagnetic
Electromagnetic spectrum
The electromagnetic spectrumExplanation
The spectrum that includes gamma rays, UV, visible light, infrared, and radio waves is known as the electromagnetic spectrum. This spectrum encompasses all the different types of electromagnetic radiation, ranging from high-energy gamma rays to low-energy radio waves. It is called the electromagnetic spectrum because it includes all the different wavelengths and frequencies of electromagnetic waves.Rate this question:
- 2.
Gamma rays travel at the same speed as radio waves in a vacuum?
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Gamma rays and radio waves both travel at the speed of light in a vacuum. This is because they are both forms of electromagnetic radiation, which all travel at the same speed. The speed of light in a vacuum is approximately 299,792,458 meters per second. Therefore, the statement that gamma rays travel at the same speed as radio waves in a vacuum is true.Rate this question:
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- 3.
Which has the highest energy?
- A.
Red Light
- B.
Microwaves
- C.
Gamma Rays
Correct Answer
C. Gamma RaysExplanation
Gamma rays have the highest energy among the given options. Gamma rays are a form of electromagnetic radiation and have the shortest wavelength and highest frequency. They are produced by radioactive decay and nuclear reactions. Due to their high energy, gamma rays can penetrate deeply into matter and are used in various applications such as cancer treatment and sterilization.Rate this question:
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- 4.
Which of these objects are Luminous?
- A.
A and B
- B.
B and C
- C.
A and C
- D.
A and B and C
- E.
All of them
Correct Answer
B. B and CExplanation
Objects that are luminous are capable of producing their own light. In this case, the correct answer is B and C. This means that objects B and C are the ones that can produce their own light, while objects A and D are not capable of doing so.Rate this question:
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- 5.
An object that doesn't let light through is called?
Correct Answer
OpaqueExplanation
Opaque refers to an object or material that does not allow light to pass through it. It is the opposite of transparent or translucent materials, which allow light to pass through. Opaque objects block the transmission of light, resulting in the inability to see through them.Rate this question:
- 6.
An object that lets some light through but not clearly is called?
Correct Answer
TranslucentExplanation
Translucent refers to an object that allows some light to pass through, but not in a clear or distinct manner. This means that while light can penetrate the object, it is scattered or diffused, resulting in a blurred or obscured view. Translucent materials are often used in various applications, such as frosted glass or wax paper, where some level of visibility is desired, but complete transparency is not.Rate this question:
- 7.
An object that lets light through clearly is called?
Correct Answer
TransparentExplanation
Transparent refers to an object that allows light to pass through it clearly without scattering or distorting the light. This means that objects behind a transparent material can be seen distinctly. Transparency is a property commonly associated with materials such as glass, water, and air.Rate this question:
- 8.
Light only travels at one speed?
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
False. The statement is incorrect. Light does not travel at only one speed. The speed of light in a vacuum is constant and is approximately 299,792 kilometers per second. However, the speed of light can vary when it passes through different mediums, such as air, water, or glass. This phenomenon is known as refraction, and it causes light to change direction and speed.Rate this question:
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- 9.
A discrete bundle of electromagnetic energy is called a what?
Correct Answer
PhotonExplanation
A discrete bundle of electromagnetic energy is called a photon. Photons are particles of light that carry energy and have properties of both particles and waves. They have no mass and travel at the speed of light. Photons are the fundamental particles responsible for electromagnetic interactions and are the basic units of all electromagnetic radiation, including visible light, radio waves, X-rays, and gamma rays.Rate this question:
- 10.
This picture below is of a squid that glows. This has a special name. What is it?
Correct Answer
bioluminescence
bioluminescentExplanation
Bioluminescence refers to the ability of certain organisms, such as this glowing squid, to produce and emit light. It is a natural phenomenon caused by chemical reactions within the organism's body. Bioluminescent organisms have special cells or organs that contain luciferin, a light-emitting pigment, and an enzyme called luciferase, which triggers the reaction. This adaptation serves various purposes, including attracting mates, camouflage, and hunting. The terms "bioluminescence" and "bioluminescent" are used interchangeably to describe this phenomenon.Rate this question:
- 11.
What sort of reflection is shown in the image above?
Correct Answer
Regular
ClearExplanation
The image above shows a regular and clear reflection.Rate this question:
- 12.
What sort of relfection is shown in the image above?
Correct Answer
DiffuseExplanation
The image above shows a diffuse reflection. Diffuse reflection occurs when light rays hit a rough or uneven surface and scatter in different directions. This type of reflection does not produce a clear or focused image, but rather a blurred or scattered reflection. In the image, the light appears to be scattered in different directions, indicating a diffuse reflection.Rate this question:
- 13.
For regular reflection, the angle of incidence and the angle of reflection are?
- A.
45°
- B.
The same
- C.
Difficult to determine
Correct Answer
B. The sameExplanation
The correct answer is "The same." This is because according to the law of reflection, the angle of incidence (the angle at which the light ray strikes a surface) is equal to the angle of reflection (the angle at which the light ray bounces off the surface). Therefore, the angles of incidence and reflection are always the same for regular reflection.Rate this question:
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- 14.
What type of mirror is this?
Correct Answer
Convex
DivergingExplanation
This mirror is a convex mirror because it curves outward and bulges in the middle. Convex mirrors are also known as diverging mirrors because they cause light rays to spread out or diverge. They have a wide field of view and are commonly used in car side mirrors to provide a wider view of the surroundings.Rate this question:
- 15.
When light moves from one ____________ to another it changes ______________. This phenomenon is called ________________. Choose the correct order of words
- A.
Area, medium, bending
- B.
Medium, speed, reflection
- C.
Speed, colour, refraction
- D.
Medium, speed, refraction
Correct Answer
D. Medium, speed, refractionExplanation
When light moves from one medium to another, it changes speed. This phenomenon is called refraction.Rate this question:
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- 16.
When observing objects under water (for example fish in a pond), we don't see the object where it actually is. This is due to the refraction or bending of light as it leaves the water. This is called "apparent depth". Do we see observe the fish above or below where it actually is?
- A.
Above
- B.
Below
- C.
No difference
Correct Answer
A. AboveExplanation
When observing objects under water, such as fish in a pond, we see them above where they actually are. This is because of the refraction or bending of light as it leaves the water. The light rays bend away from the normal as they pass from water into air, causing the fish to appear higher than their actual position. This phenomenon is known as "apparent depth."Rate this question:
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- 17.
What sort of lens is this?
- A.
Convex and Diverging
- B.
Convex and Converging
- C.
Concave and Diverging
- D.
Concave and Converging
Correct Answer
C. Concave and DivergingExplanation
This lens is concave and diverging because a concave lens is thinner at the center and thicker at the edges, causing light rays to spread out or diverge after passing through it.Rate this question:
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- 18.
The colour and sparkle of a diamond is due to refraction of the light passing through it. It has to be cut at very precice angles for this to occur. The splitting of the light into its different colours is called.
Correct Answer
DispersionExplanation
The splitting of light into its different colors is called dispersion. This occurs when light passes through a medium, such as a diamond, and is refracted at precise angles. The refraction causes the different wavelengths of light to separate, creating a colorful display and sparkle in the diamond.Rate this question:
- 19.
The light doesn't travel straight through the diamond, it reflects off the inside. This is called.
- A.
Total refraction
- B.
Total internal reflection
- C.
Rainbows!
Correct Answer
B. Total internal reflectionExplanation
When light enters a diamond, it undergoes total internal reflection, meaning it reflects off the inside surfaces of the diamond instead of passing straight through. This phenomenon occurs due to the high refractive index of the diamond, which causes the light to bounce back inside the diamond rather than refracting outwards. This is why diamonds are known for their sparkle and brilliance.Rate this question:
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- 20.
A camera used a ______________ lens.
Correct Answer
ConvexExplanation
A camera uses a convex lens because a convex lens is thicker at the center and thinner at the edges, causing light rays to converge. This convergence allows the camera to focus the incoming light onto the image sensor or film, resulting in a clear and focused image.Rate this question:
- 21.
The colours of the rainbow are: Orange Blue Red Green Yellow Indigo Violet
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The given answer is true because the colors listed, orange, blue, red, green, yellow, indigo, and violet, are indeed the colors of the rainbow. The rainbow is a natural phenomenon that occurs when sunlight is refracted, or bent, as it passes through raindrops in the atmosphere, creating a spectrum of colors. These colors are commonly represented as the seven colors listed in the answer. Therefore, the statement is correct.Rate this question:
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- 22.
What colour light is reflecting off the surface of this image below?
Correct Answer
YellowExplanation
The image is reflecting yellow light because the answer states that the color of the light reflecting off the surface is yellow.Rate this question:
- 23.
What colour is the object that the light is bouncing off?
Correct Answer
GreenExplanation
The object that the light is bouncing off is green.Rate this question:
- 24.
What colour does the surface appear to the observer in the diagram above?
Correct Answer
BlackExplanation
In the diagram above, the surface appears to be black to the observer. This can be inferred from the given information that the answer is black.Rate this question:
- 25.
What are the three primary colours of light?
- A.
Red, Blue, Orange
- B.
Red, Blue, Green
- C.
Red, Blue, Yellow
Correct Answer
B. Red, Blue, GreenExplanation
The three primary colors of light are red, blue, and green. These colors are considered primary because they cannot be created by mixing other colors of light. When combined in different intensities, they can create all other colors in the visible light spectrum. This is the basis for the RGB color model used in electronic displays and digital imaging.Rate this question:
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- 26.
When you add two primary colours together you get a secondary colour. What are the three secondary colours of light?
- A.
Yellow, Orange, Purple
- B.
Cyan, Yellow, Purple
- C.
Yellow, Magenta, Cyan
- D.
Cyan, Magenta, Orange
Correct Answer
C. Yellow, Magenta, CyanExplanation
When you add two primary colors of light together, you get a secondary color. In the case of light, the three primary colors are red, green, and blue. When you add red and green light together, you get yellow. When you add blue and red light together, you get magenta. And when you add green and blue light together, you get cyan. Therefore, the three secondary colors of light are yellow, magenta, and cyan.Rate this question:
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Mar 14, 2023Quiz Edited by
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Apr 11, 2011Quiz Created by
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