A student uses a lens of focal length 40 cm and another of - 20 cm. The power and focal length of the combination will be: Power of Combination Focal length of Combination (a) - 2.5 D - 40 cm + 2.5 D + 40 cm (C) + 5.0 D + 20 cm.
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was a hot summer day when Trishna kept her favourite plant in the balcony The sunlight was too hard to bear. After a few hours Trishna observed that the leaves of the plant have wilted down. Trisha started crying that her plant has been died. But her mother told that she will make it normal after sometime, Answer the following questions based on above information: What has happened with the plant? (u) How will Trishna's mother make the plant normal (1) Which type of value is explored by Trishna's mother
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