|
If the image formed by a lens for all positions of the object placed in front of it is always virtual
|
|
1
|
9750
|
April 3, 2019
|
|
The image formed by a spherical mirror is real, inverted and is of magnification - 2
|
|
1
|
3606
|
April 3, 2019
|
|
A student wants to project the image of a candle flame on a screen 80 cm
|
|
1
|
619
|
April 3, 2019
|
|
An object of height 5 cm is placed perpendicular to the principal axis of a concave lens of focal length 10 cm
|
|
1
|
1113
|
April 3, 2019
|
|
If the image formed by a mirror for all positions of the object placed in front of it is always erect and diminished
|
|
1
|
1144
|
April 3, 2019
|
|
To construct ray diagrams, two rays of light are generally so chosen that it is easy
|
|
1
|
2131
|
April 3, 2019
|
|
To construct a ray diagram use two rays of light which are so chosen that it is easy to determine their directions
|
|
1
|
565
|
April 3, 2019
|
|
A student wants to project the image of a candle flame on a screen 60 cm
|
|
1
|
1199
|
April 3, 2019
|
|
A ray of light incident on a concave lens is (i) passing through its optical centre
|
|
1
|
1773
|
April 3, 2019
|
|
A spherical mirror produces an image of magnification-Ion a screen placed at a distance of 40 cm from the mirror:
|
|
1
|
694
|
April 3, 2019
|
|
A spherical mirror produces an image of magnification on a screen placed at a distance of 50 cm from the mirror
|
|
1
|
1173
|
April 3, 2019
|
|
State the laws of refraction of light. If the speed of light in vacuum is 3 x 108ms-1
|
|
1
|
580
|
April 3, 2019
|
|
An object of height 6 cm is placed perpendicular to the principal axis of a concave lens of focal length 5 cm
|
|
1
|
9855
|
April 3, 2019
|
|
An object of height 5 cm is placed perpendicular to the principal axis of a concave lens of focal length 10 cm
|
|
1
|
1441
|
April 3, 2019
|
|
Mention the types of mirrors used as (i) rear view mirrors
|
|
1
|
634
|
April 3, 2019
|
|
State the types of mirrors used for (i) headlights and
|
|
1
|
789
|
April 3, 2019
|
|
A 5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 12 cm
|
|
1
|
770
|
April 3, 2019
|
|
The image of a candle flame placed at a distance 36 cm from a spherical lens is formed
|
|
1
|
1468
|
April 3, 2019
|
|
The image of a candle flame placed at a distance 30 cm from a spherical lens is formed on a screen
|
|
1
|
893
|
April 3, 2019
|
|
At what distance should an object be placed from a lens of focal length 25 cm
|
|
1
|
2532
|
April 3, 2019
|
|
A convex mirror used on a bus has a focal length of 200 cm
|
|
1
|
12410
|
April 3, 2019
|
|
An object 50 cm tall is placed on the principal axis of a convex lens. Its 20 cm tall image
|
|
1
|
1028
|
April 3, 2019
|
|
A concave lens has focal length of 20 cm
|
|
1
|
1045
|
April 3, 2019
|
|
A 5.0cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 20 cm
|
|
1
|
865
|
April 3, 2019
|
|
An object is placed at a distance of 15 cm from a convex lens of focal length 20 cm
|
|
1
|
2555
|
April 2, 2019
|
|
An object is placed at a distance of 30 cm from a concave lens of focal length 15 cm
|
|
1
|
6197
|
April 2, 2019
|
|
The refractive indices of glass and water with respect to air are 3/2 and 4/3 respectively
|
|
1
|
1027
|
April 2, 2019
|
|
What is meant by power of lens? What does its sign (+ ve or -ve) indicate?
|
|
1
|
5335
|
April 2, 2019
|
|
State two positions in which a concave mirror produces a magnified image of a given object
|
|
1
|
627
|
April 2, 2019
|
|
The absolute refractive indices of glass and water are 4/3 and 3/2 respectively
|
|
1
|
1253
|
April 2, 2019
|