Red Shift and Blue Shift in Spectroscopy

Red shift and blue shift are two important terms used in spectroscopy. They refer to the shift in the wavelength of light that occurs when the light source or the observer is moving relative to each other. Let us understand these terms in detail.

Red Shift

Red shift is the phenomenon where the wavelength of light increases and appears more towards the red end of the spectrum. It is also called a bathochromic shift. The red shift is observed when the light source or object is moving away from the observer. The red shift is an important tool used in astronomy to determine the distance and velocity of celestial objects.

Blue Shift

Blue shift is the phenomenon where the wavelength of light decreases and appears more towards the blue end of the spectrum. It is also called a hypsochromic shift. The blue shift is observed when the light source or object is moving towards the observer. The blue shift is also used in astronomy to determine the velocity of celestial objects.

True Statements

The two true statements about red shift and blue shift are:

A) Red shift is also called as Bathochromic shift.
B) Blue shift is also called as Hypsochromic shift.

Explanation

The two statements are true because red shift and blue shift are the same phenomena referred to by different names. The red shift is also known as a bathochromic shift because it causes the light to shift towards the red end of the spectrum. Similarly, the blue shift is also known as a hypsochromic shift because it causes the light to shift towards the blue end of the spectrum.

Conclusion

Red shift and blue shift are important terms used in spectroscopy. The red shift is observed when the light source or object is moving away from the observer, while the blue shift is observed when the light source or object is moving towards the observer. The two true statements about red shift and blue shift are that red shift is also called a bathochromic shift and blue shift is also called a hypsochromic shift.