Question

A Teacher gives a convex lens and a concave mirror of gogal length of 20 cm each to His Student. The Student uses a Distanz tere as the object and obtains Its sharp Image, One by One on a Screen .The distances d1 and d2 between the lens / mirror and the Screen in the Two cases and the nature of Theke respective sharp images are Likely to be (a) (20 cm, 40cm) and (erect and erect) (b) (20cm, 40cm) And (inverted and inverted) (c) (20cm, 20cm) And (inverted and inverted) (d) (20cm, 40cm) And (erect and inverted) . Give Reasons for ur answer .

Answer 1

EXAMS OVER! REALLY SORRY!

Answer 2

option c is the correct one

because concave mirror amways form real and inverted image and at focus because object is at the infinity so f means 20cm and in the same to the convex lens so c is the correct one.