what can scientists measure from the visible light stars emit?\na. color, wavelength, and brightness\nb…

what can scientists measure from the visible light stars emit?\na. color, wavelength, and brightness\nb. color, brightness and size\nc. brightness, wavelength and size\nd. wavelength, size, and color
Answer
Answer:
A. color, wavelength, and brightness
Brief Explanations:
Scientists can measure a star's color (related to temperature), wavelength (from spectroscopy), and brightness (apparent and absolute magnitudes). Size is not directly measured from visible - light emission alone.