A double convex lens (`R_(1)=R_(2)=10 cm`) having focal length equal to the focal length of a concave mirror. The radius of curvature of the concave m

Question

A double convex lens (`R_(1)=R_(2)=10 cm`) having focal length equal to the focal length of a concave mirror. The radius of curvature of the concave m

A double convex lens (`R_(1)=R_(2)=10 cm`) having focal length equal to the focal length of a concave mirror. The radius of curvature of the concave mirror
A. 10 cm
B. 20 cm
C. 40 cm
D. 15 cm

Monjur Alahi

6 views

2025-01-04 04:42

1 Answers

Related Questions

If in a plano-convex lens, the radius of curvature of the convex surface is 10 cm and the focal length of the lens is 30 cm , then the refractive inde

2 Answers 5 Views

When a thin convex lens is put in contact with a thin concave lens of the same focal length (f), then the resultant combination has focal length equal

2 Answers 4 Views

An object placed at 20cm in front of a concave mirror produces three times magnified real image. What is the focal length of the concave mirror?

2 Answers 5 Views

An object is placed 30cm away from a convex lens of focal length 10cm and a sharp image is formed on a screen. Now, a convex lens is placed In contact

2 Answers 5 Views

The radius of curvature of the convex face of a plano convex lens is 12cm and the refractive index of the material of the lends 1.5. Then, the focal l

2 Answers 5 Views

A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed at 30 cm from the lens. The image is

2 Answers 9 Views

A convex lens of radii of curvature 20cm and 30 cm respectively. It is silvered at the surface which has smaller radius of curvature. Then it will beh

2 Answers 7 Views

Assertion : The radius of curvature of a mirror is double of the focal length. Reason : A concave mirror of focal length f in air is used in a medium

2 Answers 6 Views

A plano-convex lens, when silvered at its plane surface is equivalent to a concave mirror of focal length `28 cm` . When its curved surface is silvere

2 Answers 5 Views

A convex lens of focal length `25 cm` and a concave lens of focal length `20 cm` are mounted coaxially separated by a distance `d cm` . If the power o

2 Answers 5 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - B
(b) we have, `1/f=(1.5-1)(1/10+1/10)`
`therefore` Focal length, f= 10 cm
Radius of curvaature, R=2f=20 cm

6 views Answered 2023-02-05 15:29