?

SAT® Subject Test in Physics

Free Version

Upgrade subject to access all content

Moderate

Creating Purple Bubble

SATPHY-19XNFJ

The thinnest bubble film in air that can possibly strongly reflect red light because of constructive interference makes up a certain bubble.

How could we create the thinnest bubble film that will strongly reflect purple light?

A

Use a thicker film than the film used for the "red" bubble.

B

Use a film with a higher index of refraction than the film used for the "red" bubble.

C

Make a bubble larger than the "red" bubble.

D

Make a bubble smaller than the "red" bubble.

E

Use a thinner film than the film used for the "red" bubble.