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Shruti Senthil Kumar

Nov 27, 2013



Sumaiya farheen

Dec 3, 2013

#### write any three uses of concave mirror



Ans:
Following are the some uses of concave mirror

<...

Sanjeev Sharma

Nov 7, 2014



Arunima

Feb 6, 2014



Harsh dharmendra

Feb 12, 2015

#### What is Newton's disc?



The '''Newton disc''' also known as Disappearing Colour Disc. It is a disc with segments in different colors usually Newton's primary colours: red, oran...

Samiha Mazher

Mar 1, 2014

#### What do you mean by rectilinear propagation of light? Give examples.



RECTILINEAR PROPAGATION OF LIGHT MEANS LIGHT TRAVELS IN STRAIGHT LINE
.EXAMPLES:WHEN YOU SWITCH ON THE TORCH LIGHT THE TRAVELS IN STRAIGHT LINE

Raghavendra Paripelli

Nov 1, 2014

#### Elaborate the principal focus of convex and concave mirror.



Answer: Principal focus of a convex mirror is a point on the principal axis, where a beam of light, parallel to the principal axis, after reflection, appears to meet (convex). Principal focus is a poi...

Sithara k jabaz

Feb 6, 2014

#### Please answer quickly



Uses of a plane mirror :- 1)In a periscope it is used as a device that enables us to see objects kept at different levels. Periscopes are used in submarines. 2)In a kaleidoscope which is a kind of toy it produc...

Naina Nisa

Feb 16, 2015

#### What is lateral inversion ?



Lateral inversion  is the interchange of left and right between an object and its image.

Seba

Jan 25, 2014

#### 1.A convex lens is said to have a real focus and a concave lens a virtual. Why? 2.When does a convex lens form a virtual image?Is the virtual image bigger or smaller than an object?



1. A convex lens is said to have a real focus and a concave lens a virtual.

Answer:  Convex lens bends a parallel beam of light ray...

Shruti Senthil Kumar

Nov 27, 2013



Sumaiya farheen

Dec 3, 2013

#### write any three uses of concave mirror



Ans:
Following are the some uses of concave mirror

<...

Sanjeev Sharma

Nov 7, 2014



Arunima

Feb 6, 2014



Harsh dharmendra

Feb 12, 2015

#### What is Newton's disc?



The '''Newton disc''' also known as Disappearing Colour Disc. It is a disc with segments in different colors usually Newton's primary colours: red, oran...

Samiha Mazher

Mar 1, 2014

#### What do you mean by rectilinear propagation of light? Give examples.



RECTILINEAR PROPAGATION OF LIGHT MEANS LIGHT TRAVELS IN STRAIGHT LINE
.EXAMPLES:WHEN YOU SWITCH ON THE TORCH LIGHT THE TRAVELS IN STRAIGHT LINE

Raghavendra Paripelli

Nov 1, 2014

#### Elaborate the principal focus of convex and concave mirror.



Answer: Principal focus of a convex mirror is a point on the principal axis, where a beam of light, parallel to the principal axis, after reflection, appears to meet (convex). Principal focus is a poi...

Sithara k jabaz

Feb 6, 2014

#### Please answer quickly



Uses of a plane mirror :- 1)In a periscope it is used as a device that enables us to see objects kept at different levels. Periscopes are used in submarines. 2)In a kaleidoscope which is a kind of toy it produc...

Naina Nisa

Feb 16, 2015

#### What is lateral inversion ?



Lateral inversion  is the interchange of left and right between an object and its image.

Seba

Jan 25, 2014

#### 1.A convex lens is said to have a real focus and a concave lens a virtual. Why? 2.When does a convex lens form a virtual image?Is the virtual image bigger or smaller than an object?



1. A convex lens is said to have a real focus and a concave lens a virtual.

Answer:  Convex lens bends a parallel beam of light ray...

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