If a light ray travels from denser to rarer medium. Which of the following statement/s are correct?

(A) Energy increases
(B) Frequency remain same
(C) Phase changes by 90°
(D) Velocity increases
(E) Wavelength decreases

Choose the correct answer from the options given below:

(B) and (D) only

The correct answer is Option (2) → (B) and (D) only

(B) Frequency does not change when light moves from one medium to another.

(D) Light travel faster in rarer medium because the refractive index decreases.