When a mirror is rotated by 20 degree by what angle reflected ray rotates?

On rotating a mirror through an angle of 20°, the reflected ray is found to get deviated through an angle Ans : 40°.

What is the angle of reflection of 20 degrees?

Angle of reflection =70∘

When a mirror is rotated through an angle θ the reflected ray from it turns through an angle of?

angle 2θ
When a plane mirror is rotated through an angle θ, the reflected ray rotates through an angle 2θ.

What will be the angle through which reflected ray will rotate if the incident ray is kept fixed and mirror is rotated though an angle α?

Answer: Angle of refraction will rotates 2 theta .

What is the angle of deviation for a ray which incident with an angle 45 on the plane mirror?

A ray of light strikes a plane mirror at an angle of incidence 45∘C as shown in fig. After reflection, the ray passes through a prism of refractive index 1.5 whose apex angle is 4∘. If the mirror is rotated by X degrees then the total deviation of ray becomes 90∘C.

What should be the angle between two plane mirrors so that whatever be the angle of incidence?

From δ=360−2θ⇒180=360−2θ⇒θ=90∘

Is the angle between the plane mirror and the incident ray is 20 degree the angle of reflection is?

Angle of reflection = 50. Hint Angle of incidence is the angle made by the incident ray with the normal of the surface.

When the angle of incidence is?

Translation: A ray of light hits a surface at a point. From that point the line straight up, at 90 degrees to the surface, is called the normal. The angle between the normal and the ray of light is called the angle of incidence. You measure the angle from the normal, which is 0 degrees, to the ray of light.

At what angle will the reflected ray turn?

question_answer Answers(3) When a mirror rotates through an angle θ a ray of light reflected from it will rotate through an angle of 2θ.

When the angle between two plane mirrors is 30 degree how many images will be formed by the mirrors?

∴ There will be 11 images formed when two mirrors are placed at an angle of 30°.

When the angle of incidence is 45 ̊ the angle of reflection is?

Explanation: According to the first law of reflection of light, if the angle of incidence is 45 degree then the angle between reflected ray and the incident ray will be 90 degree.

What is the angle of incidence on plane mirror?

When the light ray is incident normally on plane mirror surface it means the angle between mirror surface and light ray is 90°.

What is the angle of incidence when a mirror is rotated?

Rotating the mirror means the normal is rotated by 2 degrees. If initially the angle of incidence was x, now the angle of incidence is x+2 with respect to the new normal. Now the new reflected ray is at angle x+2 with the new normal, which itself is at angle 2 degrees with the old normal. Hence the reflected ray is at x+4 degrees to the old normal.

How many degrees of deflection does a mirror have?

The reflected ray always leaves at twice the angle that the mirror is rotated.Think of it along the lines that the normal, the perpendicular line to the mirror, has rotated by 20 degrees. The incoming and departing rays are 20 degrees either side of the normal resulting in the 40 degrees total deflection.

What is deviation in a plane mirror?

Deviation produced by a plane mirror can be defined as the angle between the directions of the incident ray and the reflected ray (or, the emergent ray). We denote it generally by the symbol δ.

What are the two angles at the point of incidence?

The incident ray and reflected ray form two angles at the point of incidence: 1 The angle formed between the normal and the incident ray at the point of incidence is called the angle of incidence. 2 Similarly, the angle formed between the normal and the reflected ray at the point of incidence is called the angle of… More