help me ra sai plsssss
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Answer:
13)The nature and approximate position is trivial. Concave lenses always produce virtual, upright, reduced images closer to the lens than the object. from the lens, virtual.
14)The focal length of a lens is depended on the surrounding medium. The reason behind this phenomenon is that the angle of refraction of a lens is depended on the indices of refraction of the medium of lens and the incoming medium and the difference in their indices.
15)Difference between convex and concave mirrors:
If the inner side of the spherical mirror is reflecting, it is called a concave mirror. If the outer side of the spherical mirror is reflecting, it is called a convex mirror. Concave mirrors can form inverted and real images and also virtual and erect images.
16)size of the object = h1 = 2 cm
size of the image = h2 = -3 cm
u = obj distance = -16 m
Therefore from formula -v/u = h2 / h1, we have
-v/(-16) = -3/2
v/16 = -3/2
v = -3* 16/2
v = - 24 cm
From mirror formula = 1/v + 1/u = 1/f
=> 1/-24 + 1/-16 = 1/f
=> 1/f = (-2 - 3)/ 48
=> 1/f = -5 / 48
=> f = - 48/5
= > f = - 9.6 cm
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Answer:
sorry ra but you gave mam