Light & Optics

Diagram shows an image formed when an object is placed in front of a mirror.

What is the object of the image shown?

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Diagram shows the formation of light spectrum on a screen by a glass prism. Which of the following is not true?

• White light consist of seven colors

• X is red light while Y is violet.

• Different coloured lights are refracted at different angles by the glass prism

• All colours of light travel at the same speed.

Diagram shows green light and cyan light projected on the white screen.

What are the colours on areas J, K and L?

• J: Yellow, K: White, L: Cyan

• J: Green, K: White, L: Cyan

• J: Cyan, K: Yellow, L: Green

• J: Green, K: Cyan, L: Cyan

Which of the following is a secondary colour of light?

• Red

• White

• Black

• Yellow

Leela wants to produce magenta from primary colour pigments.

Which of the following mixtures will produce magenta?

• Cyan

• Blue

• Green

• Yellow

• Red

Diagram shows an object P placed in front of a convex mirror.

What are the characteristics of the image formed?

• Real, inverted and diminished

• Real, upright and magnified

• Virtual, inverted and magnified

• Virtual, upright and diminished

Diagram shows a light ray travels from medium R to medium S.

Suggest materials that may be represented by medium R and S

• R: Glass

• S: Air

• R: Air

• S: Glass

Diagarm show type of mirror.

Which of the following are the characteristics of the image formed by this mirror?

• Upright

• Virtual

• Bigger

• Laterally inverted

Diagram shows the coloured light produced when light S and T are beamed on a white wall.

What is the colour of lights S and T?

• Blue and red

• Yellow and green

• Red and green

• Blue and green

Diagram shows two students standing in front of plane mirror.

What is the distance between student K with the image of student L?

• 7 m

• 8 m

• 11 m

• 15 m