Geometrical Optics

A virtual, erect, and smaller-than-object image is always formed by:

 
 
 
 

Radius of curvature of a convex mirror is 20 cm, its focal length is:

 
 
 
 

A magnifying glass has a focal length of 5 cm, then its magnifying power is:

 
 
 
 

A concave lens has a focal length of 5 cm. Find its power:

 
 
 
 

An incident ray of light makes an angle of 30° with a plane mirror. What is the angle of reflection of the light ray?

 
 
 
 

The near point of a person lies at 40 cm from him. He is suffering from:

 
 
 
 

Accommodation in the eye is done by:

 
 
 
 

A concave lens forms a virtual, erect, and enlarged image if the object is placed:

 
 
 
 

The focal length of a concave lens is:

 
 
 
 

A denser medium has a refractive index of 1.5, then the critical angle for it is:

 
 
 
 

Question 1 of 10

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