1)

 Two objects P and Q are placed at 10 cm and 30 cm infornt of a convex lens of focal length 20 cm . The correct option for the image of p and Q is 


A) P-virtual and inverted Q-real and upright

B) P-virtual and upright Q-real and inverted

C) P-real and inverted Q-virtual and upright

D) P-real and upright Q-virtual and inverted

Answer:

Option B

Explanation:

 Focal length of convex lens =20 cm

 Here, object P is  at 10 cm

 and object Q is at 30 cm

 As object P is between focus and pole. Its image is virtual and erect

Object Q is beyond focus, So its image is real and inverted