Total Internal Reflection: The critical angle for a substance in air is measured at 53.7°. If light enters this substance from air at 45.0° with the normal, at what angle with the normal will it continue to travel?
A. 34.7°
B. 45.0°
C. 53.7°
D. It will not continue, but will be totally reflected.
Answer: A
You might also like to view...
After light from a source passes through two slits, a first-order bright spot is seen on the wall at point P. Which distance is equal to the wavelength of the light?
a.
the extra distance one beam must travel
b.
the distance between beams as they leave the slit
c.
the distance of point P from the central point of the interference pattern
d.
the distance between slits
A ball is thrown upward with a speed and direction such that it reaches a maximum height of 16.0 m above the point it was released. At its maximum height it has a speed of 18.0 m/s. With what speed was the ball released?
A) 25.3 m/s B) 22.2 m/s C) 33.0 m/s D) 29.2 m/s E) 36.9 m/s
A hollow sphere has a mass of 15 kg, an inner radius of 12 cm and an outer radius of 18 cm. What is the rotational inertia (moment of inertia) of the sphere about an axis passing through its center?
A) 0.15 kg?m2 B) 0.24 kg?m2 C) 0.13 kg?m2 D) 0.17 kg?m2 E) 0.19 kg?m2
In the hydrogen atom the potential energy is negative, but the absolute value of the potential energy
a. is equal to the kinetic energy of the electron. b. is twice the kinetic energy of the electron. c. is half the kinetic energy of the electron. d. is equal to n2 times the kinetic energy of the electron.