Star Brightness

The video tutorial explains the concept of apparent brightness, which is how bright a star appears from Earth. It includes an activity using flashlights to demonstrate how distance affects perceived brightness. The tutorial concludes with questions that help relate the activity to the apparent brightness of stars, including why the Sun appears so bright despite not being the brightest star in the sky.

What is the term used to describe how bright a star appears to us on Earth?

• Absolute magnitude

• Apparent brightness

• Luminosity

• Intrinsic brightness

In the flashlight activity, what is the main variable being tested?

• The size of the flashlight

• The distance of the flashlight from the observer

• The battery life of the flashlight

• The color of the flashlight

During the flashlight activity, which flashlight will appear the brightest to the observer?

• All flashlights will appear equally bright

• The one farthest from the observer

• The one in the middle of the room

• The one closest to the observer

What conclusion can be drawn about the apparent brightness of stars based on the flashlight activity?

• Stars closer to Earth appear dimmer

• Stars farther from Earth appear brighter

• Stars closer to Earth appear brighter

• Distance does not affect apparent brightness

Why does the Sun appear so bright to us compared to other stars?

• It has the highest intrinsic brightness

• It is made of a different material

• It is the closest star to Earth

• It is the largest star in the universe