PHYSICS CHAPTER 26

translucent

Frosted glass is an example of a(n) __________ material. opaque transparent reflective translucent

glass

Which of the following would have the highest transmittance? a baseball glass sunglasses copper sheeting

False

A basic color category is determined by its value. True False

True

Refracting telescopes use two double convex converging lenses. True False

400x

A microscope that has a 10 power ocular and a 40 power objective has a magnification of _______ power. 4x 30x 50x 400x

False

Because luminous intensity (IL) is a measure of the rate of the emission of luminous energy, it has the SI unit of the watt. True False

False

The objective of a compound microscope magnifies the object, producing an enlarged virtual image. True False

lumen

What is the SI unit for luminous flux? candela lux lumen steradian

False

Additive primary colors can be combined to form all possible colors, including black. True False

False

Any possible color can be produced by the appropriate combination of two or more additive primary colors. True False

False

If a blue sock is illuminated by blue light, it will appear green. True False

4x

If a microscope has an objective lens with a focal length of 40 m and an eyepiece with a focal length of 10 m, what is the magnifying power of the microscope? 4x 30x 50x 400x

squared distance from the light source.

Illuminance (E) is inversely proportional to the squared distance from the light source. luminous intensity of the light source. distance from the light source. luminous flux density of the light source.

True

Illuminance is the amount of light an object receives from a light source. True False

objective lens

In a compound microscope, which part of the microscope produces a magnified, inverted real image? ocular assembly substage condenser phase-contrast element objective lens

False

Larger changes in electron energy produce lower energy emissions that are observed as lower frequencies of light. True False

True

Light's frequency determines its color. True False

True

Luminous flux is measured in units called lumens. True False

False

Newton corrected the Cassegrainian telescope's spherical aberration problem by adding a correcting plate, thus creating the Newtonian reflector telescope. True False

False

No mixture of subtractive colors can produce the color black. True False

True

The apparent brightness of an illumination source depends on one's distance from the source. True False

True

The energy of a light photon is directly proportional to its frequency. True False

True

The eyepiece of a microscope magnifies the image of the objective, producing an enlarged virtual image for the eye. True False

False

The final image in a standard compound microscope is inverted bottom-to-top and reversed left-to-right. True False

False

The image produced by the ocular of a standard compound microscope can be projected on a screen. True False

True

The image produced from a refractor telescope is upside down and reversed left-to-right. True False

ratio

The magnifying power of a telescope is equal to the ______ of the focal lengths of the objective and the ocular. addition subtraction ratio product

hue

The mixture of wavelengths in light that determine its color type is referred to as hue. saturation. value. intensity.

Hue

The mixture of wavelengths in light that determines its color type is referred to as hue. saturation. value. intensity.

1008 mm.

The objective lens that will produce the greatest magnification in a telescope with a given eyepiece has a focal length of 560 mm. 678 mm. 815 mm. 1008 mm.

True

The overall magnification of a standard compound microscope is equal to the product of the individual magnifications of the lenses. True False

True

The photometer in a camera can indicate the luminous intensity of a light source. True False

False

The subtractive primary colors are the additive complements orange, purple, and yellow. True False

luminous flux

Which illumination property is measured in units of cd • sr? luminance illuminance luminous flux luminous intensity

cyan, magenta, yellow

Which of the following color mixtures will produce the color black? red, blue, green red, yellow, blue cyan, magenta, yellow blue, magenta, yellow

All of the above are correct reasons.

Which of the following is a reason why the light coming from an object may be red? he object may be illuminated by only red light. The object may reflect only red light. The object may be transparent, transmitting only red. All of the above are correct reasons.

Yellow

Which of the following is not one of the three colored lights that can produce any color in the spectrum when combined? red yellow green blue

metal

Which of the following would have the lowest transmittance? air tissue paper frosted glass metal

Galilean

Which one of the following telescopes does not use mirrors? Schmidt-Cassegrainian Cassegrainian Newtonian Galilean

the objective lens

Which part of a microscope does light pass through first? the objective lens the ocular lens the eyepiece the binocular lens

Galilean

Which telescope is not a reflector telescope? Galilean Newtonian Cassegrainian Schmidt-Cassegrainian

refractor

Which telescope was developed first? refractor Newtonian reflector Cassegrainian reflector Schmidt-Cassegrainian reflector

photometer

an instrument that compares the luminous intensity of an unknown light source to a standard light source photometer luminous flux luminous intensity illuminance

illuminance

the amount of light an object receives from a light source photometer luminous flux luminous intensity illuminance

luminous intensity

the brightness of a light source photometer luminous flux luminous intensity illuminance

luminous flux

the measure of the total power produced by a light source photometer luminous flux luminous intensity illuminance