When is the reflection of sound harmful?

Answer the following questions: Sometimes reflections of sound may be undesirable. Can you give some example?

Answer the following questions: State one similarity and one difference regarding reflection of sound and light.

Choose the correct alternative and write it along with its allotted alphabet: What is the measure of the angle made by the reflected sound with the reflecting surface when the angle incidence is 30^@ A. 0^@ B. 30^@ C. 90^@ D. 60^@

What is meant by reflection of light and what are the types of reflection?

A motor car blowing a horn of frequency 124 vib//s moves with a velocity 72 km//hr towards a tall wall. The frequency of the reflected sound heard by the driver will be (velocity ofsound in air is 330 m//s )

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15 ms^(-1) . Then, the frequency of sound that the observer hears in the echo reflected from the cliff is (Take velocity of sound in air = 330 ms^(-1) )

Fill in the blanks : The reflection of light from a wooden surface is ………. Reflection .

Choose the correct alternative and write it along with its allotted alphabet: Which of the following is the requirement for regular reflection of sound? A. smooth surface B. Rough surface C. Vacuum D. Transparent rough surface

When an aeroplane attains a speed higher than the velocity of sound in air, a loud bang is heard. This is because

When wavefront strikes a reflecting surface.