O level Physics Light (5 qns)

The diagram below shows two incoming parallel light rays 1 and 2 which pass through a thin converging lens. Which of the points will the light ray 3 pass through?

• A

• B

• C

• D

4 students P, Q, R, S are standing in front of the mirror. Who can Q see in the mirror?

• P

• Q

• R

• S

Two parallel rays of light pass through an isosceles glass prism with a refractive index of 1.5. Which of the following statement(s) is/are true?

• Total internal reflection occurs at the base of the prism

• An object viewed through this prism in this way will appear upside down

• The critical angle for the glass prism is more than 45°

• None of the statements are true

Ren Jie was looking through the mirror at his musical instrument. Where is the position of the image of musical instrument?

• A

• B

• C

• D

A light ray passes through three media of refractive indices n1, n2, and n3 respectively. Given that θ1 > θ3 > θ2, which of the following is correct?

• n1 > n2 > n3

• n2 > n1 > n3

• n1 > n3 > n2

• n2 > n3 > n1