Explanation:
frequency =speed/wavelength
=5/0.5=10Hz
Explanation:
see the above attachment to solve the question and get the answer.
hope this helps you.
Answer:
A plain mirrior is a mirrior with flat reflective surface.
hope it is helpful for you.
The magnitude of Alioth ( the brightest star in the big dipper ) is 1.76 and it is about 81 light years distant from Earth.