RECAP

The phenomenon by which the incident light falling on a surface is sent back into the same medium is known as ________.

• REFLECTION

• REFRACTION

• POLARISATION

• DIFFRACTION

Choose the laws of reflection and refraction.

• The reflected and refracted rays are in the same plane as the incident ray and the normal.

• The angle of incidence equals the angle of reflection

• For waves of a particular frequency and for a chosen pair of media the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant called the (relative) refractive index

• ALL THE ABOVE

When light travels from denser to rarer medium, it bends-------

• it bends away from the normal

• it bends towards the normal

 

When light travels from rarer to denser medium, it bends-------

• it bends away from the normal

• it bends towards the normal

When light travels from a denser medium to a rare medium speed of light will-------

• increase

• decrease

• remains same

When light travels from a rarer medium to a denser medium speed of light will--------

• increase

• decrease

• remains same

A ray of light is incident on a plane mirror and the angle of reflection is 50 degrees. What is the angle between the incident ray and the reflected ray?

• 50 degree

• 100 degree

• 90 degree

• 180 degree

According to the laws of reflection, if i = angle of incidence and r = angle of reflection,

• i=r

• i<r

• i>r

• i is not equal to r

A ray of light is incident on a plane mirror and the angle of incidence is 25 degrees. What is the angle of reflection?

• 0 degrees

• 25 degrees

• 50 degrees

• 90 degrees

sinθ₁/sinθ₂ = ₁n₂  , this expression  represents,

• Snell's law

• Malu's law