Question

Which type of electromagnetic wave travels through space the slowest? All EM waves travel at the same speed. Microwaves Radio waves Ultraviolet light Infrared light As you are looking through two polarizers at a lightbulb, it ap-pears as bright as possible. After turning one of the polarizer, by 180 degrees, the lightbulb would appear hellip hellip equally bright. hellip as dark as possible. hellip darker, but not as dark as it could be if you turned the polarizers differently. Two polaroids are placed in an unpolarized beam of light with an angle theta = 34degree between their axes. What percent of the incident light makes it through? 0.0 28.4 34.4 43.3 55.0 65.2 87.5 100.0 A rear view mirror cm a car has the words 'Objects in mirror are closer than they appear' written on it. Which kind of mirror is it? Convex mirror Concave mirror Plane mirror Cannot tell A fiber optic cable consists of a glass core surrounded by a layer of material called the cladding further surrounded by a protective cover as shown in the drawing above. If the index of refraction of the core is n_1 = 1.42 and the index of refraction of the cladding is n_2 = 1.21, what is the critical angle (in degrees) for total internal reflection for light traveling in the core? 33.0 43.9 58.4 77.7 103.4 137.5 137.5 182.9 243.2

Answer 1

14 : option (A) is correct

15 option (A) is correct answer

16 from the Malus law

I1 = Io/2

I2 = I1 cos ^ theta

= Io/2 cos^2 (34 )

I2/Io = 34.4

(17)

convex mirror , meaning of that sentence is  the objects are made smaller by the mirror, so they appear farther away

As per guide lines I worked first 4 parts of the problem