Consider 3 polarizers. Polarizer 1 has a vertical transmission axis and polarizer 3 has a horizontal transmission axis. Taken together, polarizers 1 and 3 are a pair of crossed polarizers. Polarizer 2, with a transmission axis of 30o to the vertical, is placed between polarizers 1 and 3. What is the intensity of light transmission that these polarizers given an initial intest of light Io?

A. 0.375 Io
B. 0.25 Io
C. 0.18 Io
D. 0.09 Io
E. zero

Option D.) 0.09 I₀

Explanation:

The intensity, I, of a polarized light after passing through a polarizing filter is given by

Original Intensity

Angle between the direction of polarization and the axis of filter

After passing through the first polarizer, the initial intensity, is halved, i.e

After passing through the second polarizer, the angle of polarization, θ = 30⁰

After passing through the third polarizer, the angle of polarization, θ = 90⁰-30⁰ = 60⁰

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.