The electric fields arriving at a point P from three coherent ...

[Frost2351]

The electric fields arriving at a point P from three coherent sources are described by E1 = E0 sin t, E2 = E0 sin (t + /4) and E3 = E0 sin (t + /2). Assume the resultant field is represented by Ep = ER sin (t + ). The amplitude of the resultant wave at P is
 a. E0.
  b. 1.5E0.
  c. 1.7E0.
  d. 2.4E0.
  e. 2.9E0.

Question 2

The tail of a comet is shortest when the comet is
 a. closest to the Sun.
  b. farthest from the Sun.
  c. closest to Earth.
  d. farthest from Earth.

[T4T]

Answer to Question 1

d

Answer to Question 2

b

[Frost2351]

TY

[T4T]

You're welcome