Exams › SSC CGL (Prelims) › General

A sound wave travels from air into water. How do its speed and wavelength change?

1. Speed increases, wavelength decreases.
2. Speed decreases, wavelength increases.
3. Speed increases, wavelength increases.
4. Speed decreases, wavelength decreases.

Correct answer: Speed increases, wavelength increases.

Solution

Sound travels faster in water than in air, so its speed increases on entering water. Since frequency remains constant, wavelength also increases because \(v = f\lambda\).

Related SSC CGL (Prelims) General questions

• Why are footballs generally spherical in shape?
• When light travels from water to air, which property remains unchanged?
• Difficulty in starting or stopping the motion of a body is due to:
• The bending of sound waves around obstacles is known as:
• Why does food cook faster in a pressure cooker?
• Why are modern tennis rackets commonly made with graphite composites?

⚔️ Practice SSC CGL (Prelims) General free + battle 1v1 →