Refraction of waves

Refraction of water wave causes wave energy to _______ at the cape

• converge

• diverge

• spread out

The amplitude of waves at the bay is _______than at the cape. The waves at the bay are calmer.

• bigger

• smaller

• taller

On a hot day, the hot surface of the ground causes the layer of air near the ground is _____.

• higher

• cooler

• warmer

The speed of sound waves ______ when it propagates from cold air to warm air.

• increases

• decreases

• remain unchanged

A circular wave has a wavelength of 2 cm and a velocity of 12 cm/s as it moves over the surface of deep water. When the circular wave moves into an area of shallower depth, its velocity becomes 6 cm/s. What is the wavelength?

• 36cm

• 1.0 cm

• 2.0cm

• 4.0cm

The water waves propagate in deep with velocity 45 m/s and in

shallow region 25 m/s . Calculate the wavelength of water wave in shallow region when the wavelength in deep region is 10 cm. ( The answer is in cm)

• 0.18

• 5.56

• 2.35

• 11.25