Class 10 ch10

The bouncing back of light in the same medium after skriking smooth, polished surface is called

• a. Reflection of light

• b. Refraction of light

• c. Scattering of light

• d. Dispersion of light

The angle between the incident ray and the normal ray is called

• a. Angle of abnormality

• B. angle of refraction

• C. angle of incidence

• D. angle of reflection

The reflection by the rough surfaces is called

• Regular reflection

• Irregular reflection

• Regular refraction

• Irregular refraction

Which one among the following is correct about laws of reflection

• Incident ray, normal and reflected ray in different plane

• Incident ray and normal lie in same plane while reflected ray in different plane

• Incident ray and reflected ray lie in different plane while normal lie in opposite plane

• Incident ray, normal and reflected ray all lie in same plane

A light ray strikes a reflective plane surface at an angle of 54° with the surface.

a. Calculate the angle of incidence

b. Calculate the angle of reflection

c. Calculate the angle made by the reflected ray and the surface

d. Calculate the angle made by the incident and reflected rays

• A 36

• B 36

• C 54

• D 72

A ray of light that strikes a plane mirror PQ at an angle of incidence of 30°, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is :

• a 30°

• B 45°.

• C 60°

• D 90°

The angle of incidence for a ray of light having zero reflection angle is

• 0°

• 30°

• 45°

• 90 °

An object is placed at a distance of 0.25m in front of a plane mirror. The distance between the object and image will be

• 0.25m

• 1.0m

• 0.5m

• 0.125m

What is the magnification of the images formed by plane mirrors.

• a. Unity

• B Two

• C. Three

• D. Zero

An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the position of the original and final images seen in the mirror is

• 2cm

• 4cm

• 10cm

• 22cm