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Deepanshu Saini
Subject: Physics
, asked 3 days ago
please solve this physics crossword as fast as possible
Answer
1
Deepanshu Saini
Subject: Physics
, asked 3 days ago
please solve this crossword as fast as possible
Answer
2
Deepanshu Saini
Subject: Physics
, asked 6 days, 17 hours ago
please solve this crossward as fast as possible
Answer
1
Akanksha Dwivedi
Subject: Physics
, asked 1 week, 3 days ago
Playing with an old lens one morning, Ravi discovers that if he holds the lens 10 cm
away from a wall opposite to a window he can see a sharp but upside down image of
outside world on the wall. That evening he covers a lighted lamp with a piece of
opaque paper on which he has pierced a small hole 1 mm in diameter. By placing the
lens between the illuminated paper and the wall, he manages to produce a sharp image
of diameter 5 mm on the wall.
1. What is the nature of the lens?
2. What is the focal length of the lens?
3. Calculate the power of the lens.
4. In the evening experiment how far from the opaque paper did he place the lens?
5. How far apart were the illuminated paper and the wall?
Answer
2
Gourima Dutta
Subject: Physics
, asked 2 weeks, 5 days ago
A 6 cm object is placed perpendicular to the principal axis of a convex lens of focal length 15 cm. The distance of the object from the lens is 10 cm. Find the position, size and nature of the image formed, using the lens formula.
Answer
1
Anya Chuchra
Subject: Physics
, asked 4 weeks ago
An object 20 cm from a spherical mirror gives rise to a virtual image 15 cm behind the mirror. The type of the mirror and its focal length is
(a) concave, 8.5 cm
(b) convex, 30 cm
(c) concave, 60 cm
(d) convex, 60 cm.
Answer
1
Pooja
Subject: Physics
, asked 4 weeks, 1 day ago
Consider the case, in which a mirror forms a real image of
height 4 cm of an object of height 1cm placed 20 cm away from
the mirror.
1. The distance from the object to its image is
(a) 20 cm (b) 80 cm (c) 60 cm (d) 70 cm
2. The focal length of mirror is
(a) -16 cm (b)12 cm (c) -15 cm (d) 10 cm
3. The radius of curvature of the mirror is
(a) -16 cm (b) -14 cm (c) -30 cm (d) -32 cm
4. The magnification of the image is
(a) 3 (b) -6 (c) -4 (d) 8
5. At what distance must an object be placed from mirror in
order that a real image double its size may be obtained?
(a) -24 cm (b) 32 cm (c) -40 cm (d) 45 cm
Answer
1
Anya Chuchra
Subject: Physics
, asked 1 month ago
An object 4 cm high is placed at a distance of 15 cm in front of a convex mirror having a radius of curvature of 10 cm. Then the image formed is at a distance of?
Answer
1
Anya Chuchra
Subject: Physics
, asked 1 month ago
Choose the
wrong
statement.
(a) A concave mirror can form a magnified real image.
(b) A concave mirror can form a magnified virtual image.
(c) A convex mirror can form a diminished virtual image.
(d) A convex mirror can form a diminished real image.
PLS ANSWER ASAP
Answer
1
Saumya
Subject: Physics
, asked on 13/4/21
Experts solve only option2
Answer
2
Akanksha Dwivedi
Subject: Physics
, asked on 13/4/21
A concave mirror forms a sharp image of a distant tree. What name is given to the distance
between the concave mirror and screen on which sharp image is formed?
Answer
2
Sneha Lahoti
Subject: Physics
, asked on 12/4/21
state the formula to find sea length
Answer
1
Sneha Lahoti
Subject: Physics
, asked on 12/4/21
A spherical mirror is used to obtain an image on a screen. The height of the image is 5 times that of the object. What is the type of mirror and at what distance is the object placed from the mirror?
Answer
1
Sneha Lahoti
Subject: Physics
, asked on 12/4/21
With a neat labelled diagram explain how the image of an extended object source is formed by a plane mirror.
Answer
1
Nayedul Alam
Subject: Physics
, asked on 11/4/21
The speed of light in air is 3 ?10 m s/, whereas that of the speed of light in water is 2.6 8
?
10 . What is the refractive index of water with respect to air?
Answer
2
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away from a wall opposite to a window he can see a sharp but upside down image of

outside world on the wall. That evening he covers a lighted lamp with a piece of

opaque paper on which he has pierced a small hole 1 mm in diameter. By placing the

lens between the illuminated paper and the wall, he manages to produce a sharp image

of diameter 5 mm on the wall.

1. What is the nature of the lens?

2. What is the focal length of the lens?

3. Calculate the power of the lens.

4. In the evening experiment how far from the opaque paper did he place the lens?

5. How far apart were the illuminated paper and the wall?

height 4 cm of an object of height 1cm placed 20 cm away from

the mirror.

1. The distance from the object to its image is

(a) 20 cm (b) 80 cm (c) 60 cm (d) 70 cm

2. The focal length of mirror is

(a) -16 cm (b)12 cm (c) -15 cm (d) 10 cm

3. The radius of curvature of the mirror is

(a) -16 cm (b) -14 cm (c) -30 cm (d) -32 cm

4. The magnification of the image is

(a) 3 (b) -6 (c) -4 (d) 8

5. At what distance must an object be placed from mirror in

order that a real image double its size may be obtained?

(a) -24 cm (b) 32 cm (c) -40 cm (d) 45 cm

An object 4 cm high is placed at a distance of 15 cm in front of a convex mirror having a radius of curvature of 10 cm. Then the image formed is at a distance of?

wrongstatement.between the concave mirror and screen on which sharp image is formed?

?

10 . What is the refractive index of water with respect to air?