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Varun Gupta
Subject: Science
, asked on 14/1/17
A bird flies down vertically towards a water surface. To fish inside the water, vertically below the bird, why will the bird appear to:
1. Be farther away than its actual distance.
2. Move faster than its actual speed.
Answer
5
Arpit Jain
Subject: Science
, asked on 11/1/17
At what distance from a convex lens of focal length 20 centimeters should a 60 cm tall object be placed so that it forms up an image at 15 centimeters from the lens
Answer
1
Shreyans Singh
Subject: Science
, asked on 9/1/17
A person needs a lens of power -5.5D for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5D.Identify the disease he is suffering from. Find the focal length of the lens required for correcting i) distant vision ii ) near vision?
Answer
2
Shreyans Singh
Subject: Science
, asked on 8/1/17
A student has difficulty in reading the blackboard while sitting on the last desk. From what defect of vision is he suffering? How can it be corrected? Draw ray diagram for it.
Answer
4
Rayyan Mansuri
Subject: Science
, asked on 12/3/17
Is there any difference between optic nerve and optic nerve fibres in the human eye?
Answer
4
Abhishek Singh
Subject: Science
, asked on 13/12/16
if the far point of eye lens is 10 m, find power of the lens required to correct the defect?
Answer
7
Shreya Choudhary
Subject: Science
, asked on 9/12/16
how can
defects of vision
be corrected
permanently
??
Answer
5
Kshitiz Anand
Subject: Science
, asked on 3/12/16
at what distance from a converging lens of focal lenght 12cm must an object be placed in order that an image of magnification 1 will be produced?Solve this using lens formula
Answer
1
Amber
Subject: Science
, asked on 26/11/16
If convex mirrors are used in magnifying glasses how is image formed magnified since convex mirror give only diminished images?
Answer
1
Anushka Mithari
Subject: Science
, asked on 14/11/16
a beam of rays, parallel to the principle axis, is incident on a convex mirror. Show, on a diagram, the path of these rays after reflection from the mirror.
Answer
2
Anushka Mithari
Subject: Science
, asked on 14/11/16
beams of light are incident through the holes c and d respectively .Which of the following could be inside the box
Answer
6
Varun
Subject: Science
, asked on 10/11/16
what is the position and nature of the image formed by concave and convex mirror when the object is placed beyond focus
Answer
3
Mitali
Subject: Science
, asked on 4/11/16
please also draw the ray diagram for given situation please!!!!
Answer
3
I L A K K I Y A
Subject: Science
, asked on 11/1/17
A object is placed in front of a convex lens of focal length 15 cm . which of the following distance produces an image of same size as that of object . (a) 35 cm (b) 30cm (c) 20cm (d) 10 cm
Answer
1
Yash Gupta
Subject: Science
, asked on 9/1/17
a concave lens of focal length 15cm forms an image 10cm from the lens how far is object placed from the lens draw a ray diagram
Answer
2
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What are you looking for?
1. Be farther away than its actual distance.
2. Move faster than its actual speed.