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Champ Jee
Subject: Science
, asked on 12/3/18
Explain why a ray of light passing through the centre of curvature of a concave mirror is reflected along same path?
Should I explain this mathematically? Since it's perpendicular as radius is always perepndi,. So angle of incidence = angle of ref ... ??
Answer
2
Aqsa
Subject: Science
, asked on 10/3/18
in which mirror would you be able to see a full size image of a part of large object
Answer
4
Chirag Khatri
Subject: Science
, asked on 9/3/18
Solve this:
Q.(b) With respect to air the refractive indices of water and benzene are 1.33 and 1.50 respectively. Calculate the refractive index of benzene with respect to water.
Answer
1
Danya Khan
Subject: Science
, asked on 8/3/18
How does the frequency of a beam of light change when entering from air to glass ??
Answer
1
Rohit Patil
Subject: Science
, asked on 8/3/18
A 4 cm tall object is placed perpendicular to the principal axis of a convex lens of focal lengh 20 cm . the distance of the object from the lens is 15 cm . Find the nature, position and the size of the image ? And also tell why would you take focal length positive?
Answer
4
Payal Arora
Subject: Science
, asked on 8/3/18
$26.Astudentfocusestheimageofacandleflame.placedatabout2fromaconvexlenseoffocallength\phantom{\rule{0ex}{0ex}}10cm,onascreen.Afterthathegraduallymovestheflametowardsthelensandeachtimefocuses\phantom{\rule{0ex}{0ex}}itsiageonthescreen.\phantom{\rule{0ex}{0ex}}\left(a\right)Inwhichdirectiondoeshemovethelenstofocustheflameonthescreen?\phantom{\rule{0ex}{0ex}}\left(b\right)Whathappenstothesizeoftheimageoftheflameformedonthescreen?\phantom{\rule{0ex}{0ex}}\left(c\right)Whatdifferenceisseenintheintensity\left(brightness\right)oftheimageoftheflameonthescreen?\phantom{\rule{0ex}{0ex}}\left(d\right)Whatisseenonthescreenwhentheflameisveryclose(atabout35cm)tothelens?$
Answer
2
Naman
Subject: Science
, asked on 8/3/18
show the chart about the negative and positive sign of object distance , image distance , focallength of convex lens , concave lens , convex mirror , concave mirror .( please give answer as soon as possible )
Answer
2
Payal Arora
Subject: Science
, asked on 7/3/18
Draw a ray diagram for refraction through a prism incident at an angle of 35 degree. The ray suffers a deviation of 37 degree. Mark the angles A and D in the diagram and find their values
Answer
1
Rohit Patil
Subject: Science
, asked on 7/3/18
Q. An object of height 4 cm is placed at a distance of 20 cm from a concave lens of focal length 10 cm. Use lens formula to determine the position of the image formed.
Answer
1
Rohit Patil
Subject: Science
, asked on 7/3/18
Solve this:
Answer
2
Vishanth
Subject: Science
, asked on 6/3/18
Two thin converging lenses of focal lengths 15cm and 30cm are held in contact. Calculate the power and focal length in combination.
Answer
3
Sathana G
Subject: Science
, asked on 5/3/18
cause of lateral inversion???
Answer
1
Knight Rider🚲
Subject: Science
, asked on 5/3/18
What is speed of light in air and water???
Answer
2
Shravani Chikalthankar
Subject: Science
, asked on 4/3/18
(a) Define focal length of a divergent lens.
(b) A divergent lens of focal length 30 cm forms the image of an object of size 6 cm on the same side as the object at a distance of 15 cm from its optical centre. Use lens formula to determine the distance of the object from the lens and the size of the image formed.
(c) Draw a ray diagram to show the formation of image in the above situation.
Answer
1
Payal Arora
Subject: Science
, asked on 1/3/18
What’s the maximum temperature attained in a concave reflector type solar cooker ?
Answer
1
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Should I explain this mathematically? Since it's perpendicular as radius is always perepndi,. So angle of incidence = angle of ref ... ??

Q.(b) With respect to air the refractive indices of water and benzene are 1.33 and 1.50 respectively. Calculate the refractive index of benzene with respect to water.

(b) A divergent lens of focal length 30 cm forms the image of an object of size 6 cm on the same side as the object at a distance of 15 cm from its optical centre. Use lens formula to determine the distance of the object from the lens and the size of the image formed.

(c) Draw a ray diagram to show the formation of image in the above situation.