Ray Optics And Optical Instruments

Physics
1192 Views

A convex glass lens is immersed in water. Compared to the power in air, its power in water will :

A
increase
B
decrease
C
not change
D
decrease for red light and increase for violet light
Easy
View solution>

A glass slab is placed in the path of beam of convergent light. The point of convergence of light 

A
moves towards the glass slab
B
moves away from the glass slab
C
remains at the same point
D
undergoes a lateral shift
Easy
View solution>

What are the colours of the Sun observed most during sunrise/sunset and noon? 

A
white and red
B
reddish and orange
C
yellow and reddish
D
orange and blue
Easy
View solution>

Red light is used as danger signal because it is:

A
Accepted as symbol
B
Pleasing to the eye
C
Sensitive to the eye
D
Has high wavelength
Easy
View solution>

The line joining the pole and the centre of curvature of a mirror is called the :

A
Aperture
B
Principal section
C
Principal axis
D
Pole
Easy
View solution>

The relation between u, v and r is:

A
B
C
D
None of these
Easy
View solution>

An achromatic combination of lenses produce :

A
images in black and white
B
colored images
C
images unaffected by variation of refractive index with wavelength
D
highly enlarged images
Easy
View solution>

An experiment is performed to find the refractive index of glass using a travelling microscope. In this experiment distances are measured by:

A
a screw gauge provided on the microscope
B
a standard laboratory scale
C
a vernier scale provided on the microscope
D
a meter scale provided on the microscope
Easy
View solution>

The distance CP is the :

A
Center of curvature
B
Radius of curvature
C
Focal length
D
None of these
Easy
View solution>