Table 2-1
$$\begin{array} { | c | c | }
\hline \begin{array} { c }
\text { Star } \
\text { Nane }
\end{array} & \begin{array} { c }
\text { Apparent Visual } \
\text { Magnitude }
\end{array} \
\hline \text { d Dra } & 3.07 \
\hline \text { a Cet } & 2.53 \
\hline \text { Nirl } & 8.07 \
\hline \alpha \text { CMa } & - 1.46 \
\hline
\end{array}$$
-Refer to Table 2-1.Which star in the table would be invisible to the unaided eye of an observer on Earth?
A)? Dra
B)? Cet
C)Nim
D) ? CMa

Question

Table 2-1
 $$\begin{array} { | c | c | } 
\hline \begin{array} { c } 
\text { Star } \
\text { Nane }
\end{array} & \begin{array} { c } 
\text { Apparent Visual } \
\text { Magnitude }
\end{array} \
\hline \text { d Dra } & 3.07 \
\hline \text { a Cet } & 2.53 \
\hline \text { Nirl } & 8.07 \
\hline \alpha \text { CMa } & - 1.46 \
\hline
\end{array}$$
-Refer to Table 2-1.Which star in the table would be invisible to the unaided eye of an observer on Earth?
A)? Dra
B)? Cet
C)Nim
D) ? CMa

Quizplus · Accepted Answer

The higher the apparent visual magnitude, the dimmer the star appears to us on Earth. The star with the highest apparent visual magnitude in the table is Nirl with a magnitude of 8.07. Since anything with an apparent visual magnitude greater than 6 is generally considered invisible to the unaided eye, Nirl would not be visible to the unaided eye of an observer on Earth.

Table 2-1 -Refer to Table 2-1