Question

A.
Fill in the blanks.
1.
A ray of light, passing from one medium to another, does not bend its path if
its angle of incidence equals
degree.
is the speed
2.
The more is the optical density of a given medium, the
of light through it.
3.
The phenomenon of the splitting of white light into seven colours is known as
the phenomenon of
4.
The point, on the principal axis of a concave lens, from where a beam of incident
parallel ray appears to diverge, is called the
of the concave lens.
5. An object should be placed at the '
point' so that a convex lens
forms its real and inverted image of the same size.​

Answer 1

Answer:

4- spectrum

5 - focal length

1- angle of reflection should be 0 and angle of emergency will be same

Answer 2

Answer:

1. The speed of light decrease while travelling air into glass or water .

2. less speed of light passing through it .

3. The dispersion of light

4. Spectrum

5. Focal length

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