Question

question 1
a viewing telescope that uses a photographic plate in place of the eyepiece is a spectroscope.
true
false
question 2
refractor telescopes have lenses with two perfectly ground sides.
true
false
question 3
the color of the light given off by the element sodium when it is heated is red.
true
false

Explanation:

• Question 1: A spectroscope is an instrument for dispersing light into a spectrum, not a viewing telescope with a photographic plate instead of an eyepiece.
• Question 2: Refractor telescopes use lenses with two ground - surfaces to refract (bend) light.
• Question 3: Sodium gives off a yellow - orange light when heated, not red.

Answer:

• Question 1: B. False
• Question 2: A. True
• Question 3: B. False