|
Rohit claims to have obtained an image twice the size of object with a concave lens. Is he correct? Give reason for your answer
|
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0
|
2177
|
March 17, 2018
|
|
Suppose you have three concave mirrors A, B and C of focal lengths 10 cm, 15 cm and 20 cm
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0
|
21448
|
March 17, 2018
|
|
It is desired to obtain an erect image of an object, using concave mirror of focal length of 12 cm
|
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0
|
3993
|
March 17, 2018
|
|
Sudha finds out that sharp image of the window pane of her science laboratory is formed at a distance of 15 cm from the lens
|
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0
|
1154
|
March 17, 2018
|
|
How is the refractive index of a medium related to the speed of light?
|
|
0
|
13558
|
March 17, 2018
|
|
A pencil when dipped in water in a glass tumbler, appears to be bent at the interface of air and water
|
|
0
|
906
|
March 17, 2018
|
|
If the image formed by a mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it?
|
|
0
|
20574
|
March 17, 2018
|
|
Distinguish between a convex lens and a concave lens?
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|
0
|
7813
|
March 17, 2018
|
|
Draw the following diagram, in which a ray of light is incident on a concave/convex mirror, on your answer sheet. Show the path of this ray, after reflection, in each case
|
|
0
|
2193
|
March 17, 2018
|
|
A student wants to project the image of a candle flame on a screen 80 cm in front of a mirror by keeping the candle flame at a distance of 20 cm from its pole
|
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0
|
53398
|
March 17, 2018
|
|
Draw a ray diagram to show the path of the reflected ray in each of the following cases. A ray of light incident on a convex mirror
|
|
0
|
22584
|
March 17, 2018
|
|
Explain with the help of a ray diagram, why a pencil partly immersed in water appears to be bent at the water surface
|
|
0
|
32490
|
March 17, 2018
|
|
To construct a ray diagram we use two rays of light which are so chosen that it is easy to determine their directions after reflection from the mirror
|
|
0
|
4033
|
March 17, 2018
|
|
Study the ray diagram given below and answer the following questions
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|
0
|
3414
|
March 17, 2018
|
|
Distinguish between real image and virtual image
|
|
0
|
3069
|
March 17, 2018
|
|
List two properties of the images formed by convex mirrors. Draw ray diagram in support of your answer
|
|
0
|
4097
|
March 17, 2018
|
|
Draw a ray diagram showing the path of rays of light when it enters with oblique incidence from air into water; from water into air
|
|
0
|
2848
|
March 17, 2018
|
|
Under what condition in an arrangement of two plane mirrors, incident ray and reflected ray will always be parallel to each other, whatever may be angle of incidence
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|
0
|
1668
|
March 17, 2018
|
|
How are power and focal length of a lens related?
|
|
0
|
5483
|
March 17, 2018
|
|
A convex lens of focal length 20 cm can produce a magnified virtual as well as the real image
|
|
0
|
965
|
March 17, 2018
|
|
Identify the device used (a spherical mirror or lens) in following cases, when the image formed is virtual and erect in each case
|
|
0
|
704
|
March 17, 2018
|
|
What will happen to a ray of light when it falls normally on a surface? Show it diagrammatically
|
|
0
|
2785
|
March 17, 2018
|
|
The linear magnification produced by a spherical mirror is +3
|
|
0
|
8282
|
March 17, 2018
|
|
State two positions in which a concave mirror produces a magnified image of a given object. List two differences between the two images
|
|
0
|
13589
|
March 17, 2018
|
|
State the laws of refraction of light. If the speed of light in vacuum is 3 X108 m/s, find the absolute refractive index of a medium in which light travels with a speed of 1.4 X108 m/s
|
|
0
|
17586
|
March 17, 2018
|
|
How can you distinguish between a plane mirror, a concave mirror and a convex mirror without touching them?
|
|
0
|
1166
|
March 17, 2018
|
|
In what way is the word AMBULANCE printed in front of the hospital vans? Why is it printed this way?
|
|
0
|
5345
|
March 17, 2018
|
|
Explain the term lateral inversion
|
|
0
|
4503
|
March 17, 2018
|
|
List four specific characteristics of the images of the objects formed by convex mirrors
|
|
0
|
1273
|
March 17, 2018
|
|
List four characteristics of the images formed by plane mirrors?
|
|
0
|
20354
|
March 17, 2018
|