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Aashish Rohilla
Subject: Physics
, asked on 2/3/18
Solve this:
Q56. A point source of light is placed 100 cm away from the pole of a convex spherical surface of radius of curvature 20 cm and material of refractive index 1.5. At what position will the image be formed ?
Answer
2
Aashish Rohilla
Subject: Physics
, asked on 2/3/18
Solve this :
50. A point source of light is placed at the bottom of a tank of height 'h'. The tank is filled with a liquid of refractive index
2
. Show that the light from the point source can come a cone base area
πh
2
.
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 2/3/18
Solve this:
Q.45. A 20 cm deep beaker is filled with two immiscible liquids A and B of refractive index 1.4 and 1.7 respectively with liquid A up to a height of 10 cm and B above it. What will be rise in level of a coin placed at the bottom of the beaker?
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 2/3/18
Solve this:
Q.38. A jogger approaches a stationary convex mirror of radius of curvature 2 m at 5 m/s. How fast does the image appear to move when the jogger is
(a) 39 m (b) 29 m and (c) 19 m away.
What difference do you observe between speed of the jogger and that of his image?
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 2/3/18
give one use of each of material with high dispersive power and low dispersive power
Answer
1
Aditi
Subject: Physics
, asked on 2/3/18
plz wxplain the concept behind how to solve numericals on the basis of combination of lens nd mirror?
Answer
1
Anushka Ranaut
Subject: Physics
, asked on 1/3/18
an object is placed 15 CM in front of a convex lens of focal length 10 cm where should a concave mirror of radius of curvature 20 CM be placed so that the final image is formed at the position of the object itself
Answer
1
Chaitanya Kapoor
Subject: Physics
, asked on 1/3/18
Solve this:
(b)
A right angled prism made from a material of refractive index
μ
is kept in air. A ray PQ is incident normally on the side AB of the prism as shown.
Find (in terms of
μ
) the maximum value of
θ
upto which this incident ray necessarily undergoes total internal reflection at the face AC of the prism.
Answer
1
Archana
Subject: Physics
, asked on 1/3/18
An object is placed 30 cm from a convex P of focal length 10 cm. Calculate the position and magnification of image. A concave lens Q of focal length 10cm is how to placed behind P to make final rays parallel tot the principal axis . Locate the position of Q with respect to P.
don't give any links !!!
Answer
3
Maya
Subject: Physics
, asked on 1/3/18
Please answer q no. 8
Q.8. A lens forms a real image of an object. The distance of the object. From the lens is U cm and the distance of the image from the lens is
ν
cm. The given graph shows the variation of
ν
and U
(a) What is the nature of the lens?
(b) Using the graph find the focal length of the lens?
Draw a ray diagram to show the formation of image of same size as that of object in case of converging lens hence derive lens equation?
Answer
2
Nithyashrri Saravanan
Subject: Physics
, asked on 1/3/18
Dear experts in.this question the image is formed just below the object then why do we take focal length in case i.e., without the liquid=30cm. It should be centre of curvature =30 cm and f=15 cm. Why? Pls explain. No links pls
Answer
1
Sofiya Parihar
Subject: Physics
, asked on 1/3/18
Answer question no.2
Q.2. A biconvex lens made of a transparent material of refractive index 1.25 is immersed in water of refractive index 1.33. Will the lens behave as a converging or a diverging lens? Give reason.
Answer
2
Tanya Pandey
Subject: Physics
, asked on 1/3/18
I am still not able to understand the sign conventions used for R1 and R2 in lens maker's formula. Please help
Answer
1
Nithyashrri Saravanan
Subject: Physics
, asked on 1/3/18
Dear experts there is a formula fpr small angled prism delta=(u-1)A. For qhat range of angle of prism can we use this
Answer
1
Tanya Pandey
Subject: Physics
, asked on 28/2/18
Question) In the above concave convex lens.
Radius of curvature of :
convex surface = 0.2 m
concave surface = 0.6 m
Which radius will be taken as
R
1
ξ
R
2
while solving for focal length using lens makes formula.
Answer
5
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What are you looking for?
Q56. A point source of light is placed 100 cm away from the pole of a convex spherical surface of radius of curvature 20 cm and material of refractive index 1.5. At what position will the image be formed ?
50. A point source of light is placed at the bottom of a tank of height 'h'. The tank is filled with a liquid of refractive index . Show that the light from the point source can come a cone base area .
Q.45. A 20 cm deep beaker is filled with two immiscible liquids A and B of refractive index 1.4 and 1.7 respectively with liquid A up to a height of 10 cm and B above it. What will be rise in level of a coin placed at the bottom of the beaker?
Q.38. A jogger approaches a stationary convex mirror of radius of curvature 2 m at 5 m/s. How fast does the image appear to move when the jogger is
(a) 39 m (b) 29 m and (c) 19 m away.
What difference do you observe between speed of the jogger and that of his image?
(b) A right angled prism made from a material of refractive index is kept in air. A ray PQ is incident normally on the side AB of the prism as shown.
Find (in terms of ) the maximum value of upto which this incident ray necessarily undergoes total internal reflection at the face AC of the prism.
don't give any links !!!
Q.8. A lens forms a real image of an object. The distance of the object. From the lens is U cm and the distance of the image from the lens is cm. The given graph shows the variation of and U
(a) What is the nature of the lens?
(b) Using the graph find the focal length of the lens?
Draw a ray diagram to show the formation of image of same size as that of object in case of converging lens hence derive lens equation?
Q.2. A biconvex lens made of a transparent material of refractive index 1.25 is immersed in water of refractive index 1.33. Will the lens behave as a converging or a diverging lens? Give reason.
Radius of curvature of :
convex surface = 0.2 m
concave surface = 0.6 m
Which radius will be taken as while solving for focal length using lens makes formula.