SELECT * FROM question_mgmt as q WHERE id=6728 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=12 AND subId=16 AND chapterId=379 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 8th science Light fill in the blanks in the following a a perso

Question:

Fill in the blanks in the following :
(a) A person 1 m in front of a plane mirror seems to be _______________ m from his image.
(b) If you touch your ____________ ear with right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with ____________
(c) The size of the pupil becomes ____________ when you see in dim light.
(d) Night birds have ____________ cones than rods in their eyes..

Answer:

(a) 2m

Plane mirror formed images eject as of the image. The distance between the object and image are same here. So, the images 1 + 1 = 2 m. away from the person.

(b) Left, left hand

This is due to the lateral inversion of images which is formed by the plane mirror.

(c) Large

The amount of light entering in the eyes is very little in dim light. Pupil expands to increase the light.

(d) Less

Night birds cannot see in day time because they have large number of rod cells and a few cone cells on their retina.


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