what+is+precautions+to+be+taken+during+the+glass+slab+experiment can i write it as
1) handle the slab with care
2) while tracing the lines keep the glass slab in a fixed position
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During the refraction, when light travels from one medium to another transparent medium, the speed and wavelength of light changes, whereas frequency remains the same.
When a light ray travels from rarer to denser medium, its speed gets slow down and the ray bends towards normal (∠i >∠r).
When the ray of light travels from denser to rarer medium, its speed goes up and the ray bends away from the normal (∠i < ∠r).
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