影

Right indexing radical 彡 (Kangxi #59) — three slanted streaks. Originally a tuft of hair, but pedagogically used for any pattern of fine lines or marks: the streaks of light or shadow. Same radical in 形 (shape), 彩 (colour), 须 (whiskers), 彬 (refined). Here the three strokes literally render the lines of a cast shadow.

Left component supplies the sound (jǐng → yǐng, a soft initial drift) and a strong semantic flavour: 景 means 'sun + capital' = a bright lit scene, exactly the kind of thing that casts a shadow. So 影 is etymologically 'the trace of a brightly lit view'. The 景-family also includes 憬 (yearn), but the sound link here is by far the clearest.