Pls dont ask to post in threads🙏
QThe power of concave lens of focal length 1mm is 1.0.01D 2.100D 3.0.001D 4.1000D QWhen a plane mirror is rotated through a certain angle the reflected ray turns through a twice or much and size of image 1.becomes twice the size of object 2.becomes half the size of object 3.becomes negligibly small 4.remains same as size of object QDuring anaerobic alcoholic fermentation by yeast alcohol is formed 1.in yeast cell's vacuole 2.in yeast cell mitochondrion 3.outside the yeast cell 4.within the yeast cell Q what is nature of food in our stomach and what is dont for pancreatic juice to act? 1 Acidic,made more acidic 2 Acidic made alkaline 3 Alkaline made acidic 4 Alkaline made more alkaline
The relation R = 2f holds true for
a. Concave mirrors only
b. Convex mirrors only
c. All spherical mirrors
d. Lens as well as for all spherical mirrors
A hole is made in a convex lens. Then :
(A) a hole appears in the image
(B) image size decreases
(C) image intensity decreases
(D) No change Please give the correct option .
Copyright © 2021 Aakash EduTech Pvt. Ltd. All rights reserved.