The law of reflection applies to
a. specular reflection.
b. diffuse reflection.
c. irregular reflection.
d. all of these.
d
You might also like to view...
A fishing-boat captain returns to port saying, "It's rough out there with waves that are 4 meters high." He is probably talking of waves of amplitude
A) 1 m. B) 2 m. C) 3 m. D) 4 m.
The only two forces acting on a body have magnitudes of 20 N and 35 N and directions that differ by 80°. The resulting acceleration has a magnitude of 20 m/s2 . What is the mass of the body?
a. 2.4 kg b. 2.2 kg c. 2.7 kg d. 3.1 kg e. 1.5 kg
A block (mass = 4.0 kg) sliding on a horizontal frictionless surface is attached to one end of a horizontal spring (k = 100 N/m) which has its other end fixed. If the maximum distance the block slides from the equilibrium position is equal to 20 cm, what is the speed of the block at an instant when it is a distance of 16 cm from the equilibrium position?
a. 71 cm/s b. 60 cm/s c. 80 cm/s d. 87 cm/s e. 57 cm/s
The magnetic permeability of a ferromagnetic material is
A) much less than ?O. B) slightly less than ?O. C) much greater than ?O. D) the same as ?O. E) slightly more than ?O.