Which of the following materials lets light pass through completely?

Which part of the ear helps in sending signals to the brain?

Which object is a source of sound?

What happens when light hits a shiny surface?

What is the speed of sound in air approximately?

Which type of wave is sound?

Which of these travels faster?

Which instrument helps us to see tiny objects using light?

Which property of sound determines whether it is loud or soft?

Why do we see lightning before hearing thunder?