Total internal reflection
A. Accounts for the brilliance of cut diamonds.
B. Allows light to travel in a curved path inside an optic fiber.
C. All of these are true.
D. Occurs when light strikes an interface at greater than the critical angle.
Ans: C. All of these are true.
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According to the Arrhenius theory, basic properties are caused by ______________ ions
Fill in the blank(s) with correct word
What is the longest wavelength of light that can cause photoelectron emission from a metal that has a work function of 2.20 eV?
A) 417 nm B) 257 nm C) 344 nm D) 564 nm E) 610 nm
Addition by 1. Components: Vector 
has a magnitude of 8.0 m and points 30° north of east; vector 
has a magnitude of 6.0 m and points 30° west of north; and vector 
has a magnitude of 5.0 m and points 30° west of south. The resultant vector 
+ 
-5.0px;" /> + 
is given by
A. 2.7 m at an angle 74° north of east.
B. 5.9 m at an angle 74° north of east.
C. 4.8 m at an angle 74° east of north.
D. 5.1 m at an angle 74° north of east.
E. 2.1 m at an angle 66° east of north.
Sunspots are hot spots on the Sun's surface caused by weak magnetic fields
Indicate whether the statement is true or false