A doctor advised to use 4D lens. The focal length of the lens is …………………….. 

Monjur Alahi

A doctor advised to use 4D lens. The focal length of the lens is …………………….. 

A) 25 cm

B) 400 cm 

C) 4 cm 

D) 40 cm


0 like 0 dislike
4 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

Correct option is  A) 25cm

0 like 0 dislike
4 views
Talk Doctor Online in Bissoy App
The distance between two focal points of a thin lens having focal length f is ……………… 

Correct option is  C) 2f

2 Answers 1 views
When a lens of focal length f is cut in to two equal halves perpendicular to principal axis, then the focal length of each part of the lens is ……………… 

Correct option is  B) double

2 Answers 1 views
A convex lens of focal length 20 cm is cut into two halves along principal axis then focal length of each part will be ………………… 

Correct option is  A) 20 cm

2 Answers 1 views
A convex lens of focal length 20 cm is cut into two halves perpendicular to the principal axis then focal length of each part will be ………………. 

Correct option is  C) 40 cm

2 Answers 1 views
A doctor has advised to use 2.5D lens. The focal length of the lens is ………………….. 

Correct option is  A) 40 cm

2 Answers 1 views
A doctor has advised to use + 1D and + 1.5D lens for his left eye and right eye respectively of a patient.

B) long-sightedness

2 Answers 3 views
Doctor advised Dileep that, he has to take insulin daily compulsorily. Which disease is he suffering from ?

C) Diabetes Mellitus

2 Answers 2 views
A doctor advised a person to take of insulin injection because his :

C) blood sugar was high

2 Answers 1 views
Ganesh entered into the Adolescence stage. He looks very weak. Doctor advised him to take the food like leafy

C) Percentage of blood is very low

2 Answers 2 views
Ganesh entered into the Adolescence stage. He looks very weak. Doctor advised him to take the food like leafy 2 Answers 1 views
X