Subject: Science, asked on 12/3/18

## Explain why a ray of light passing through the centre of curvature of a concave mirror is reflected along same path? Should I explain this mathematically? Since it's perpendicular as radius is always perepndi,. So angle of incidence = angle of ref ... ??

Subject: Science, asked on 10/3/18

## in which mirror would you be able to see a full size image of a part of large object

Subject: Science, asked on 9/3/18

## Solve this: Q.(b) With respect to air the refractive indices of water and benzene are 1.33 and 1.50 respectively. Calculate the refractive index of benzene with respect to water.

Subject: Science, asked on 8/3/18

## How does the frequency of a beam of light change when entering from air to glass ??

Subject: Science, asked on 8/3/18

## A 4 cm tall object is placed perpendicular to the principal axis of a convex lens of focal lengh 20 cm . the distance of the object from the lens is 15 cm . Find the nature, position and the size of the image ? And also tell why would you take focal length positive?

Subject: Science, asked on 8/3/18
Subject: Science, asked on 8/3/18

## show the chart about the negative and positive sign of object distance , image distance , focallength of convex lens , concave lens , convex mirror , concave mirror .( please give answer as soon as possible )

Subject: Science, asked on 7/3/18

## Draw a ray diagram for refraction through a prism incident at an angle of 35 degree. The ray suffers a deviation of 37 degree. Mark the angles A and D in the diagram and find their values

Subject: Science, asked on 7/3/18

## Q.  An object of height 4 cm is placed at a distance of 20 cm from a concave lens of focal length 10 cm. Use lens formula to determine the position of the image formed.

Subject: Science, asked on 7/3/18

## Solve this:

Subject: Science, asked on 6/3/18

## Two thin converging lenses of focal lengths 15cm and 30cm are held in contact. Calculate the power and focal length in combination.

Subject: Science, asked on 5/3/18

## cause of lateral inversion???

Subject: Science, asked on 5/3/18

## What is speed of light in air and water???

Subject: Science, asked on 4/3/18

## (a) Define focal length of a divergent lens. (b) A divergent lens of focal length 30 cm forms the image of an object of size 6 cm on the same side as the object at a distance of 15 cm from its optical centre. Use lens formula to determine the distance of the object from the lens and the size of the image formed. (c) Draw a ray diagram to show the formation of image in the above situation.

Subject: Science, asked on 1/3/18

## What’s the maximum temperature attained in a concave reflector type solar cooker ?

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