Which of the following is due to the change in wave speed when a wave strikes the boundary to another medium?

مندرجہ ذیل میں سے کون سی لہر کی رفتار میں تبدیلی کی وجہ سے ۔۔۔۔ ہوتا ہے جب لہر کسی دوسرے میڈیم سے ٹکراتی ہے؟

reflection

refraction

polarization

diffraction

interference

The phenomenon is known as refraction

The phenomenon of refraction is observed when a wave hits another boundary's medium.

The speed of the waves decreases in an optically denser medium, and hence the wavelength of the wave.

This causes the bending of the ray of light.