Question 1

The electric field for a plane electromagnetic wave traveling in the +y direction is shown.Consider a point where   is in the +z direction.The   field is:

Accepted Answer

A) in the +x direction and in phase with the   field 
B) in the -x direction and in phase with the   field 
C) in the +x direction and 1/4 wave out of phase with the   field 
D) in the +z direction and in phase with the   field 
E) in the +z direction and 1/4 wave out of phase with the   field 
A) in the +x direction and in phase with the   field 
B) in the -x direction and in phase with the   field 
C) in the +x direction and 1/4 wave out of phase with the   field 
D) in the +z direction and in phase with the   field 
E) in the +z direction and 1/4 wave out of phase with the   field

Question 2

Light with an intensity of 1 kW/m2 falls normally on a surface and is completely reflected.The radiation pressure is:

Accepted Answer

A) 1 kPa 
B) 3 *1011 Pa 
C) 1.7 * 10-6 Pa 
D) 3.3 * 10-6 Pa 
E) 6.7 *10-6 Pa 
A) 1 kPa 
B) 3 *1011 Pa 
C) 1.7 * 10-6 Pa 
D) 3.3 * 10-6 Pa 
E) 6.7 *10-6 Pa

Question 3

Consider radio waves (r), visible light (v), infrared (i), X rays (x), and ultraviolet (u).In order of increasing frequency, they are:

Accepted Answer

A) r, v, i, x, u 
B) r, i, v, u, x 
C) i, r, v, u, x 
D) x, u, v, i, r 
E) r, i, v, x, u 
A) r, v, i, x, u 
B) r, i, v, u, x 
C) i, r, v, u, x 
D) x, u, v, i, r 
E) r, i, v, x, u

Exam 33: Electromagnetic Waves

The electric field for a plane electromagnetic wave traveling in the +y direction is shown.Consider a point where is in the +z direction.The field is:

Light with an intensity of 1 kW/m2 falls normally on a surface and is completely reflected.The radiation pressure is:

Consider radio waves (r), visible light (v), infrared (i), X rays (x), and ultraviolet (u).In order of increasing frequency, they are:

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Light with an intensity of 1 kW/m² falls normally on a surface and is completely reflected.The radiation pressure is: