An optical SETI signal would most likely consist of A) using ...

[genevieve1028]

An optical SETI signal would most likely consist of
 
  A) using mirrors to reflect light from the surface of a planet
  B) using a giant disk to block out the light from the parent star
  C) rapid, short bursts of intense laser light
  D) a continuous beam of laser light

Question 2

A convex lens is placed on a flat glass plate and illuminated from above with monochromatic red light. When viewed from above, concentric bands of red and dark are observed.
 
  What does one observe at the exact center of the lens where the lens and the glass plate are in direct contact? A) a bright red spot
  B) a dark spot
  C) a rainbow of color
  D) a bright spot that is some color other than red

[okolip]

Answer to Question 1

C

Answer to Question 2

B

[genevieve1028]

TYSM

[sarah_brady415]

Wow, this really help