Question

What is the temperature of a distant star that is seen to have an "orange hot" color? The wavelength of orange can be considered to be 605 nm?

Select one:

a. 605 K

b. None of the above

c. 4793 K

d. 2.09 x 10^-4 K

Answer 1

Answer:

Option (C) - 4793 K

Yes, 605 nm can be considered as  its wavelength

Explanation:

The star that is present at  great distance from the earth, that appears to be orange in color is the star called the Arcturus. It is a giant orange star that is moving at a very high speed of about 125 km/sec relative to our solar system. It is about 25 times the diameter of the sun and it is older than the sun. The temperature of this giant star is about 8,000° F (4700 K). In comparison to the sun, it is very much cooler because the sun is very hot and its temperature is about 10,000° F.

So the closest given option for temperature is option (C) i.e. 4793 K.

The wavelength of the orange light ranges from 590-625 nm. So we can consider its wavelength to be 605 nm.