Question

Select One Option Correct from the following : A student performed the experiment for determination of focal length of a concave mirror by using u-v method using an optical bench of length1.5 m. The focal length of the mirror used is 24 cm. The maximum error inthe location of the image can be 0.2 cm. The 5 sets of (u,v) values recordedby the student (in cm) are: (42,56), (48,48), (60,40), (66,33) and (78,39).The data set(s) that cannot come from experiment and is (are) incorrectly recorded, is (are)
(A) (42,56)
(B) (48,48)
(C) (66,33)
(D) (78,39)

Answer 1

a option is correct I think

Answer 2

Select One Option Correct from the following : A student performed the experiment for determination of focal length of a concave mirror by using u-v method using an optical bench of length1.5 m. The focal length of the mirror used is 24 cm. The maximum error inthe location of the image can be 0.2 cm. The 5 sets of (u,v) values recordedby the student (in cm) are: (42,56), (48,48), (60,40), (66,33) and (78,39).The data set(s) that cannot come from experiment and is (are) incorrectly recorded, is (are)

✴️ (A) (42,56)

(B) (48,48)

(C) (66,33)

(D) (78,39)