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2 A 60w lygt bulb himmous efficienay is \( 14 \operatorname{lm} \) per \( W \) is suspended \( 2 \mathrm{~m} \) over a table \( i \) what is the illumination on the table directly under the bulb. ii How high orker the table should the bulb be in order to double the illumination. 3 A cand \( 65 \mathrm{~cm} \) high is placed \( 20 \mathrm{~cm} \) in Ront of a concave muror whose focal lergth is \( 15 \mathrm{~cm} \). Find the Cocation size and nature of the image. 4 An object \( 0.5 \mathrm{~cm} \) high is placed \( 8 \mathrm{~cm} \) Prom a Consex lens of \( 10 \mathrm{~cm} \) focal length. find the position and size of the image? 5 A cartain prisin is found to produle a minimuin derlatron of \( 51^{\circ} \). while it produces a deviation of \( 62.8^{\circ} \)

          2 A 60w lygt bulb himmous efficienay is \( 14 \operatorname{lm} \) per \( W \) is suspended \( 2 \mathrm{~m} \) over a table
\( i \) what is the illumination on the table directly under the bulb.
ii How high orker the table should the bulb be in order to double the illumination.
3 A cand \( 65 \mathrm{~cm} \) high is placed \( 20 \mathrm{~cm} \) in Ront of a concave muror whose focal lergth is \( 15 \mathrm{~cm} \). Find the Cocation size and nature of the image.
4 An object \( 0.5 \mathrm{~cm} \) high is placed \( 8 \mathrm{~cm} \) Prom a Consex lens of \( 10 \mathrm{~cm} \) focal length. find the position and size of the image?
5 A cartain prisin is found to produle a minimuin derlatron of \( 51^{\circ} \). while it produces a deviation of \( 62.8^{\circ} \)

2 A 60w lygt bulb himmous efficienay is 14 lm per W is suspended 2 m over a table
i what is the illumination on the table directly under the bulb.
ii How high orker the table should the bulb be in order to double the illumination.
3 A cand 65 cm high is placed 20 cm in Ront of a concave muror whose focal lergth is 15 cm. Find the Cocation size and nature of the image.
4 An object 0.5 cm high is placed 8 cm Prom a Consex lens of 10 cm focal length. find the position and size of the image?
5 A cartain prisin is found to produle a minimuin derlatron of 51^∘. while it produces a deviation of 62.8^∘

Added by Balogun S.

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