Question

good morning
i want all answer

Answer 1

Answer:

Please increase points. Then I will help for sure

OK fyn I m helping

A)

1. Childhood

2.afternoon

3.relationship

4. Unhappy

5. Dangerous

6. Wonderful

7. Countless

8. Impatient

9.excitement

10.perfection

B)

A cup of coffee

A bagful of money

A spoon full of sugar

A pocket full of silver

C)

1. Bagful

2. Handful

Please mark me as the brainliest

Please

Answer 2

Answer:

ok man

Explanation:

1. Define (i) optic centre (ii) principal focus (iii) focal length of a spherical lens

2. Redraw the given diagram and show the path of the refracted ray:

3. A student obtained a sharp image of a lighted candle on a screen using a convex

lens. Now he wants to focus a distant lamp on a far away electric pole. In which

direction should the lens be move for this purpose with respect to the screen, to get

a sharp image on the screen? Justify your answer.

4. A student has to project a three times magnified image of a candle flame on a wall.

Name the type of the lens (converging/ diverging) required for the purpose. It the

candle flame is at a distance of 6 m from the wall, find the focal length of the lens.

5. (i) Rohit claims to have obtained an image twice the size of object with a concave

lens. Is he correct? Give reason for your answer.

(ii) Where should an object be placed in case of a convex lens to form an image of

same size as of the object? Show with the help of ray diagram the position and the

nature of the image formed.

(iii) With the help of ray diagram, illustrate the change in position, nature and size of

the image formed if the convex lens in case of (ii) is replaced by concave lens of

same focal length.

6. An object 2 cm high is placed at a distance of 64 cm from a white screen. On placing

a convex lens at a distance of 32 cm from the object it is found that a distinct image

of the object is formed on the screen. What is the focal length of the convex lens

and size of the image formed on the screen? Draw a ray diagram to show the

formation of the image in this position of the object with respect to the lens.