Physics, asked by aryanchum46, 10 months ago

is anyone knows the toughtest numrical of class 10 then pls provide me with answer

Answers

Answered by rajadcsh24

Answer:

Q. Name the part of the human eye that helps in changing the focal length of the eye lens.

Q. Name the component of white light which deviates

(i) The least and

(ii) The most while passing through a glass prism.

Q. Why does the clear sky appear blue? How would the sky appear in the absence of earth’s atmosphere?

Q. Draw a ray diagram to show the path of the reflected ray corresponding to an incident ray which is directed parallel to the principal axis of a convex mirror. Mark on it the angle of incidence and the angle of reflection.

Q. A spherical mirror produces an image of magnification −1 on a screen placed at a distance of 40 cm from the mirror:

(i) Write the type of mirror.

(ii) What is the nature of the image formed?

(iii) How far is the object located from the mirror?

(iv) Draw the ray diagram to show the image formation in this case.

Q. (a) what is meant by fossil fuel?

(b) Which fossil fuel is usually conserved when we save on electricity?

Q. (a) With the help of ray diagrams, show the formation of image by

(i) a hyperme tropic eye and (ii) correction of hypermetropia by using an appropriate lens.

(b) The near point of a person suffering from hypermetropia is at 50 cm from his eye. what is the power of the lens needed to correct this defect? (near point of normal eye is 25 cm)

Q. Hypermetropia is a defect of vision with which a person can see the distant objects clearly but is unable to see the nearby objects distinctly. This defect might be caused due to which of the following reasons:

(i) Eye ball being too short.

(ii) Short focal length of eye lens.

(iii) Eye ball being too long.

(iv) Large focal length of eye lens.

Choose the correct option among the following:

(a) i and ii

(b) ii and iii

(d) iii and iv

I hopes it helps you

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