EASY
JEE Advanced
IMPORTANT
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The intensity of direct sunlight on a surface normal to the rays is I0. What is the intensity of direct sunlight on a surface, whose normal makes an angle of 60° with the rays of the sun?

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Important Questions on Geometric Optics

MEDIUM
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 126
A lamp is hanging at a height of 4 m above a table. The lamp is lowered by 1 m. The percentage increase in illuminance will be
MEDIUM
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 127
In a photometer two sources of light when placed at distances 20 cm and 30 cm respectively produce shadows of equal intensities. Their luminous intensities are in the ratio of
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 128
An electric bulb illuminates a plane surface. The intensity of illumination on the surface at a point 2 m away from the bulb is 5×10-4 phot lumen cm-2. The line joining the bulb to the point makes an angle of 60° with the normal to the surface. The intensity of the bulb in candela (candle power) is
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 129
For a normal eye, the least distance of distinct vision is
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 130
For the myopic eye, the defect is cured by
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 131
Astigmatism (for a human eye) can be removed by using
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 132
Image formed on the retina is
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 133
If there had been one eye of the man, then