Question 1

The portion of the electromagnetic spectrum that affects the sense of sight in humans is called the:

Accepted Answer

The visible spectrum is the portion of the electromagnetic spectrum that humans are able to see with our eyes. It includes wavelengths of light that range from approximately 400 to 700 nanometers, which corresponds to colors ranging from violet to red.

Question 2

Radiation is seen as colors, the longest of which is seen as red and the shortest of which is seen as:

Accepted Answer

The full spectrum of radiation, also known as the electromagnetic spectrum, ranges from the longest waves that we can see as red, to the shortest waves that we can see as violet. Therefore, the shortest radiation is seen as violet, which corresponds to choice B.

Question 3

When all wavelengths of the visible spectrum are radiated by a light source in equal amounts, the mixture is seen as this color.

Accepted Answer

When all wavelengths of the visible spectrum are radiated in equal amounts, it creates the perception of white light.

Question 4

The point at which light rays converge after traveling through glass is called the:

Accepted Answer

The point at which light rays converge after traveling through glass is called the focus.

Question 5

Which of the following is NOT one of the factors that can affect the resolution of a digital image as discussed in the text?

Accepted Answer

Shutter speed can affect the overall quality of the image, but it does not directly impact the resolution of the image. Camera resolution, ISO setting on the camera, and duration of the photographic exposure all play a role in determining the resolution of a digital image.

Question 6

The process of constructing a full color image from the Bayer filter colors is a process referred to as Bayer interpolation or:

Accepted Answer

The process of constructing a full color image from the Bayer filter colors is known as demosaicing or Bayer interpolation. This involves estimating the missing color information from neighboring pixels with a different color filter to create a full color image. Choices A, B, and C are not related to this process.

Question 7

JPEG stands for:

Accepted Answer

JPEG stands for Joint Photography Expert Group.

Question 8

A Bayer Filter is rather complex, using transparencies of black and white filters to produce over 1,000 known colors.

Accepted Answer

A Bayer Filter uses patterns of red, green, and blue filters to create color information in digital images. It does not produce over 1,000 known colors, but rather uses a color interpolation process to create the appearance of full color.

Question 9

TIFF stands for Tagged Image File Format and is another type of image file that can be generated by a digital camera.

Accepted Answer

TIFF is a valid image file format that can be generated by a digital camera.

Question 10

Camera sensors are not capable of producing color images.

Accepted Answer

Camera sensors are only capable of capturing light intensity, not color. The colors in an image are created by the camera's software, which interpolates the colors based on the light intensity values captured by the sensor.

Question 11

Lights sources such as the sun and flames emit radiations within the visible spectrum and are referred to as nonluminous objects.

Accepted Answer

Nonluminous objects do not emit their own light and only reflect light from other sources. The sun and flames, on the other hand, are luminous objects that emit their own light.

Question 12

Light, heat rays, X-rays, and radio waves are all forms of radiant energy.

Accepted Answer

Radiant energy refers to all forms of electromagnetic radiation, including light, heat, X-rays, and radio waves.

Quiz 4: Light Theory and Digital Imaging