Question

Question 4 (1 point)
Airport security uses electromagnetic waves to see items inside of luggage without having to open the bags. Which type of electromagnetic waves would be best for airport security to use?
a
X-rays would be best because they are low-energy waves that can penetrate gases.
b
X-rays would be best because they are high-energy waves that can penetrate solids.
c
Radar waves would be best because they are low-energy waves that can penetrate gases.
d
Radar waves would be best because they are high-energy waves that can penetrate solids.

Answer 1

Question 5 (1 point)
A student must create a mode of a lens. The lens must be able to focus light into a small space. Which best describes the type of lens the student should model?

a
The student should model a concave lens because it gathers bands of color together to form white light.
b
The student should model a convex lens because it gathers bands of color together to form white light.
c
The student should model a concave lens because it directs light toward the center of the lens.
d
The student should model a convex lens because it directs light toward the center of the lens.

Answer 2

b
X-rays would be best because they are high-energy waves that can penetrate solids.