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Name Chapter 30 Lenses Percent Transmission of Light 100% of the light that strikes it through the lens. Consider the two lenses No glass lens is perfectly transparent, that is, the lens does not transmit in a telescope, the objective lens and the eyepiece lens. If the objective lens transmits 96% of the light, and the eyepiece lens transmits 97%, what percent of light from a distant source reaches your eye? 1. Read and Understand What information are you given? Transmission of objective lens = 96% Transmission of eyepiece lens = 97% 2. Plan and Solve What unknown are you trying to calculate? Percent of light transmitted through two-lens system = ? What formula contains the given quantity and the unknown? Transmitted light = Incident light x Percent transmission Substitute the known values and solve. For light passing through two lenses, multiply the incident light by the percent transmission of each lens. Assume the amount of incident is unity, or 1. Transmitted light = Incident light X Percent transmission objective Percent transmission eyepiece Transmitted light = 1 x 0.96 x 0.97 Transmitted light = 0.93 or 93% of the light passes through the two-lens system 3. Look Back and Check Is s your answer reasonable? Yes, it makes sense that the amount of light that passes through is less than the percent transmission value for each lens. Math Practice On a separate sheet of paper, solve the following problems. 1. The diaphragm of a digital camera limits the lens opening to allow only 50% of the incident light to enter the lens. If the percent transmission of the multi-lens optical system used in the camera is 88%, what percent of the total incident light makes its way to the electronic sensor? บ

Name Chapter 30 Lenses Percent Transmission of Light 100% of the light that strikes it through the lens. Consider the two lenses No glass lens is perfectly transparent, that is, the lens does not transmit in a telescope, the objective lens and the eyepiece lens. If the objective lens transmits 96% of the light, and the eyepiece lens transmits 97%, what percent of light from a distant source reaches your eye? 1. Read and Understand What information are you given? Transmission of objective lens = 96% Transmission of eyepiece lens = 97% 2. Plan and Solve What unknown are you trying to calculate? Percent of light transmitted through two-lens system = ? What formula contains the given quantity and the unknown? Transmitted light = Incident light x Percent transmission Substitute the known values and solve. For light passing through two lenses, multiply the incident light by the percent transmission of each lens. Assume the amount of incident is unity, or 1. Transmitted light = Incident light X Percent transmission objective Percent transmission eyepiece Transmitted light = 1 x 0.96 x 0.97 Transmitted light = 0.93 or 93% of the light passes through the two-lens system 3. Look Back and Check Is s your answer reasonable? Yes, it makes sense that the amount of light that passes through is less than the percent transmission value for each lens. Math Practice On a separate sheet of paper, solve the following problems. 1. The diaphragm of a digital camera limits the lens opening to allow only 50% of the incident light to enter the lens. If the percent transmission of the multi-lens optical system used in the camera is 88%, what percent of the total incident light makes its way to the electronic sensor? บ

Inquiry into Physics
Inquiry into Physics
8th Edition
ISBN:9781337515863
Author:Ostdiek
Publisher:Ostdiek
Chapter9: Optics
Section: Chapter Questions
Problem 20Q
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Name Chapter 30 Lenses Percent Transmission of Light 100% of the light that strikes it through the lens. Consider the two lenses No glass lens is perfectly transparent, that is, the lens does not transmit in a telescope, the objective lens and the eyepiece lens. If the objective lens transmits 96% of the light, and the eyepiece lens transmits 97%, what percent of light from a distant source reaches your eye? 1. Read and Understand What information are you given? Transmission of objective lens = 96% Transmission of eyepiece lens = 97% 2. Plan and Solve What unknown are you trying to calculate? Percent of light transmitted through two-lens system = ? What formula contains the given quantity and the unknown? Transmitted light = Incident light x Percent transmission Substitute the known values and solve. For light passing through two lenses, multiply the incident light by the percent transmission of each lens. Assume the amount of incident is unity, or 1. Transmitted light = Incident light X Percent transmission objective Percent transmission eyepiece Transmitted light = 1 x 0.96 x 0.97 Transmitted light = 0.93 or 93% of the light passes through the two-lens system 3. Look Back and Check Is s your answer reasonable? Yes, it makes sense that the amount of light that passes through is less than the percent transmission value for each lens. Math Practice On a separate sheet of paper, solve the following problems. 1. The diaphragm of a digital camera limits the lens opening to allow only 50% of the incident light to enter the lens. If the percent transmission of the multi-lens optical system used in the camera is 88%, what percent of the total incident light makes its way to the electronic sensor? บ
Transcribed Image Text:Name Chapter 30 Lenses Percent Transmission of Light 100% of the light that strikes it through the lens. Consider the two lenses No glass lens is perfectly transparent, that is, the lens does not transmit in a telescope, the objective lens and the eyepiece lens. If the objective lens transmits 96% of the light, and the eyepiece lens transmits 97%, what percent of light from a distant source reaches your eye? 1. Read and Understand What information are you given? Transmission of objective lens = 96% Transmission of eyepiece lens = 97% 2. Plan and Solve What unknown are you trying to calculate? Percent of light transmitted through two-lens system = ? What formula contains the given quantity and the unknown? Transmitted light = Incident light x Percent transmission Substitute the known values and solve. For light passing through two lenses, multiply the incident light by the percent transmission of each lens. Assume the amount of incident is unity, or 1. Transmitted light = Incident light X Percent transmission objective Percent transmission eyepiece Transmitted light = 1 x 0.96 x 0.97 Transmitted light = 0.93 or 93% of the light passes through the two-lens system 3. Look Back and Check Is s your answer reasonable? Yes, it makes sense that the amount of light that passes through is less than the percent transmission value for each lens. Math Practice On a separate sheet of paper, solve the following problems. 1. The diaphragm of a digital camera limits the lens opening to allow only 50% of the incident light to enter the lens. If the percent transmission of the multi-lens optical system used in the camera is 88%, what percent of the total incident light makes its way to the electronic sensor? บ
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