Question

4) A ray of white light is incident on a prism surface at some angle, so that you see a rainbow coming out from the other side. Order the colors with respect to their individual degrees of refraction, that is, by their refraction angles. (order them from 1 to 4)

        

           - 1. 2. 3. 4. Yellow

         - 1. 2. 3. 4. Red

         - 1. 2. 3. 4. Blue

         - 1. 2. 3. 4. Green

5) Rainbows are the results of both refraction and total internal reflexion of sunlight in water droplets in the air.

a) True

b) False

7)A diverging lens always forms an upright, virtual, and larger image.

a) True

b) False

9)Glasses for nearsighted people have diverging lenses, and glasses for farsighted people have converging lenses.

a) True

b) False

Answer 1

4) When a ray of white light falls on the surface of the prism with some angle it splits into 7 different color i.e in increasing order of deviation..

Red
Orange
Yellow
Green
Blue
Indigo
Violet

Order of colors with respect to their individual degrees of refraction, that is, by their refraction angles. (order them from 1 to 4)

1 -Red

2 -Yellow

3 -Green

4 -Blue

5) The answer for this question is - TRUE

A rainbow IS formed when light strike the water drops in the atmosphere of earth at some certain angle. Rainbow is a atmospheric phenomenon that is formed through optical processes such as refraction, dispersion, internal reflection and secondary refraction.

7) Properties of image formed by the diverging lens ;

• Located on the object's side of the lens
• Image is located between the object and the lens
• A virtual and upright image
• Reduced in size (i.e. smaller than the object   

So the anwer is-FALSE

Diverging lens never formed larger image then object.

9) Answer is-TRUE

Myopia , often called nearsightedness because people with myopia can focus well on near objects but faraway objects appear blurry, to  correct it, a diverging or negative artificial lens is used.

Hyperopia often called farsightedness because people with hyperopia can focus well on faraway objects but near objects may appear blurry. to  correct it, a conversing or positive artificial lens is used.