EASY
Earn 100

Complete the ray diagram for the incident rays OA, OA1, OA2OA3.

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Important Questions on Light – Reflection and Refraction

MEDIUM
Draw the path of a ray of light when it enters one of the faces of a glass slab at an angle of nearly 45°. Label on it (i) angle of refraction, (ii) angle of emergence and (iii) lateral displacement.
EASY

What is the relation between the refractive index of water with respect to air μwa , and the refractive index of air with respect to water μaw .

EASY
State the laws of refraction of light. Explain the term 'absolute refractive index of a medium' and write an expression to relate it with the speed of light in vacuum.
EASY
An air bubble in a glass slab with refractive index 1.5 (near-normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness (in cm) of the slab is
MEDIUM

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In the diagram shown above n1, n2 and n3 are refractive indices of the media 1,2 and 3 respectively. Which one of the following is true in this case?

EASY
A travelling microscope is focused on an ink dot. When a glass slab (n=1.5) of thickness 9 cm is introduced on the dot, the travelling microscope has to be moved by
MEDIUM
The absolute refractive index of Ruby is 1.7. Find the speed of light in Ruby. The speed of light in vacuum is 3×108 ms.
MEDIUM

When a ray of light is incident perpendicularly on a transparent glass slab, what will be its angle of deviation?

MEDIUM

The refractive index of medium A is 1.5 and that of medium B is 1.33. If the speed of light in air is  3×108 m/s, what is the speed of light in medium A and B respectively?

MEDIUM

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A ray of light is incident as shown. If A, B and C are three transparent media, then which among the following options is true for the given diagram?

 

EASY
Because of early sunrise and late sunset, the length of day becomes _____ minutes long. 
EASY
A glass slab is placed over a piece of paper on which VIBGYOR is printed with each letter in its corresponding colours. The colour that appears to be raised maximum is :
EASY

"Ray of light travels from optically rarer medium to optically denser medium, it moves towards normal and when it travels from optically denser to optically rarer medium it moves away from the normal is known as refraction of light". Which of the following pentagon figures shows the correct refraction of light.

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MEDIUM

What will be the velocity and wavelength of light in a medium of refractive index 1.5 if the wavelength of the light is 6000 A in air medium?. Take the speed of light in air=3×108 m s-1.

EASY
Which of the following has a higher Refractive Index?
EASY
Light enters from air to glass. If refractive index of glass is 1.5 and speed of light is 3×108 m s-1. Then the speed of light in the glass will be:
EASY
Which equation not represent snell’s law?
EASY

If the refractive index of water with respect to air (μwa )  is 53.  Calculate the refractive index of air with respect to water (μaw ).

HARD

A ray of light starting from air passes through medium A of refractive index 1.50, enters medium B of refractive index 1.33 and, finally enters medium C of refractive index 2.42. If this ray emerges out in air from C, then for which of the following pairs of media the bending of light is least?

MEDIUM

If a beam of red light and a beam of violet light are incident at the same angle on the inclined surface of a prism from air medium and produce angles of refraction r and v respectively. Which of the following is correct?