WAEC - Physics (1991 - No. 32)
Which of the following remains unchanged as light travels from one medium to the other? i. speed. ii. wavelength. iii. frequency.
i only
ii only
iii only
i and ii only
i and iii only
توضيح
The frequency of the light ray remains same when it travels from one medium to another because it depends on the source of light. But the wavelength and speed vary because they depend on the medium through which the light passes.