05-01-2018, 04:34 PM
* Ratio of the height of the image to the height of the real object is known as
Ans : Magnification
*Mirror equation
1/u + 1/V = 1/f
*If a person is reflected in a plane mirror, his right hand side appears to be the left hand side of the image. This phenomenon is known as - lateral inversion. The image is known as mirror image.
Remember
*Convex lens is also known as
Ans : Converging lens
*Concave lens is also known as
Ans : Diverging lens
*The lens in Human Eye
Ans : Convex Lens
*Image formed in Convex lens
Ans : Real and inverted
*Image formed in Concave lens
Ans : Virtual and erect
*Lens used as magnifying glass
Ans : Convex Lens
*Lens used in Microscope and Telescope
Ans : Convex Lens
*Power of a lens is measured in
Ans : Dioptre
*Mirror used in solar cooker
Ans : Concave Mirror
*Mirror used as rearview mirrors in vehicles
Ans : Convex Mirror
*Lens used in car head light
Ans : Concave Lens
* Mirror used by the doctors for examining teeth, eyes, ear, nose etc
Ans : Concave Mirror
*Mirrors used as shaving mirrors
Ans : Concave mirror
*Short sight and long sight can be corrected together by
Ans : Bifocal Lens
*Bifocal Lens was invented by
Ans : Benjamin Franklin
ATMOSPHERIC LAYERS
Troposphere
*Lowest atmospheric layer
Ans : Troposphere
*Most clouds and weather are found in Troposphere
*Weather change occurs in
Ans : Troposphere
*Troposphere is thicker at the equator and thinner at the poles
*In troposphere the temperature decreases with altitude.
*The line which separate Troposphere and Stratosphere
Ans : Tropopause
*The layer which is known as lower atmosphere
Ans : Troposphere
* The densest part of the atmosphere which contains 85% of atmosphere’s mass
Ans : Troposphere
Stratosphere
*The second lowest layer of Earth’s atmosphere
Ans : Stratosphere
*Ozone layer is found in
Ans : Stratosphere
*In stratosphere temperature increases with altitude.
*Layer in which jet airplanes fly
Ans : Stratosphere
*The line which separates stratosphere and Mesosphere
Ans : Stratopause
