At P₂ the Waves from Sources S₁ and S₂ Shown

question 45

Multiple Choice

At P₂ the waves from sources S₁ and S₂ shown in the figure

• A) are in phase.
• B) have a path difference of one wavelength.
• C) have a path difference of one-half wavelength.
• D) are interfering constructively.
• E) None of these is correct.

---

Definitions:

Rubella

A contagious viral infection, also known as German measles, characterized by a rash and fever, and dangerous for pregnant women due to potential harm to the fetus.

Pregnancy

The state of carrying a developing fetus within the female body, typically lasting about 40 weeks from the last menstrual period to childbirth.

HIV

Human Immunodeficiency Virus, a virus that attacks the immune system and can lead to AIDS (Acquired Immunodeficiency Syndrome) if not treated.

AZT

A medication used to prevent and treat HIV/AIDS by interfering with the virus’s ability to replicate.